Lors de la période de guerres civiles (49-31 a.C.) qui marqua la fin de la République, les armées, guidées par des imperatores rivaux, jouèrent un rôle central sur la scène politique romaine. Notre étude s’est portée sur l’encadrement des armées dans cette période. Comme dans toute armée, l’obéissance, la discipline voire le dévouement des troupes étaient assurés par des cadres militaires que l’on pourrait qualifier d’officiers, préfets, tribuns militaires, questeurs et légats. On a créé une base de données recensant l’ensemble des conduites individuelles de ces cadres des armées tardo-républicaines. On s’est livré d’abord à une analyse de la position institutionnelle de ces personnages, de leurs fonctions et de la chaîne de commandement dans laquelle ils s’inséraient. On a ensuite examiné les compétences et la formation de ces personnages, qui ne connurent pas de professionnalisation et n’étaient pas des techniciens. Enfin, le rôle politique de ces officiers qui étaient des partisans politiques des imperatores, a fait l’objet d’un examen d’ensemble. / During the Civil Wars which marked the end of the Republican Period in Rome, armies, led by rival imperatores, were important actors of the Roman political scene. This study is about the military cadres during this period. As in any army, obedience, discipline and loyalty were based on the action of military cadres, who can be considered as officers, such as prefects, military tribunes, quaestors and legates. I have created a database, grouping the whole individual actions of these military cadres in late-republican armies. First, I have made an analysis of the institutional positions of these officers, I have studied their functions, and the command chain they were part of. Then, I have studied the competences and the military formation of these individuals, who were not professionals nor technicians. Finally, the political role of these officers, who were kinsmen of the great imperatores, is analysed.

The British Civil Wars were not just physical battles but ideological battles as well. Legitimate authority was hotly contested and each faction vied for public support by invoking a mandate meaningful to a heterogeneous audience: the safeguarding of the family and the patriarchal order. In early modern England and Scotland, the family was understood as emblematic of the social and political order; thus, the protection of the family – both private and political - was presented as the surest way of assuaging God’s wrath and re-establishing order in the three kingdoms. This thesis demonstrates the ubiquity of the language of patriarchy in the Civil Wars and the extent to which political and ideological debates centred on questions of legitimate patriarchal authority.

Cette thèse étudie les politiques de sécurité et de défense développées dans la corne de l’Afrique. Notre objectif principal est de montrer qu’en Somalie, en Érythrée, en Éthiopie et à Djibouti les facteurs politiques, historiques, économiques et sociaux se combinent pour expliquer la situation d’insécurité totale qui règne dans la région. Sa position géostratégique fait d’elle, une zone très convoitée pour mieux lutter contre le terrorisme et la piraterie. Cet avantage géographique est peu rentabilisé à cause des guerres civiles, des contentieux territoriaux et des catastrophes naturelles qui ont engendré l’une des plus grandes crises humanitaires et alimentaires au monde. Devant cet état de fait, les politiques de sécurité et défense, qu’elles soient régionales et continentale, semblent être impuissantes. Les échecs de ces politiques découlent, d’une part ; des discordes entre les chefs d’État et, d’autre part ; du manque de moyens financiers des États, de l’Union africaine et de ses organismes sous régionaux (l’IGAD et le COMESA). En étudiant le cas de Djibouti, nous montrerons que la politique de sécurité nationale souffre de plusieurs maux. En effet, la corruption, le clientélisme, le tribalisme et le détournement des deniers publics affaiblissent la politique sécuritaire et incitent les populations appauvries aux soulèvements. Djibouti, étant l’un des pays le plus stable de la région, constitue un baromètre pour mieux mesurer les nouvelles menaces qui déstabiliseraient la zone. Pays limitrophes des foyers du terrorisme et de la piraterie, il est le choix d’implantation, par excellence, des bases militaires françaises, américaines, japonaise et de plusieurs autres contingents. Ainsi, en bénéficiant de l’aide et de la protection de ces États, il devient, par conséquent, une cible des groupes terroristes. L’apport sécuritaire et économique des bases sont indéniables. Cependant, elles ne manquent pas d’impacter négativement sur son environnement social. / This thesis studies the politics of security and defence that have been developed in the Horn of Africa. Our main objective is to show that in Somalia, Eritrea, Ethiopia and Djibouti there are political, historical, economical and sociological factors that explain the prevailing insecurity within the region. Its geostrategic position makes it a coveted area for fighting terrorism and piracy. Nevertheless this geographical advantage is not as profitable as it could be because of civil wars, boundary disputes and natural disasters that have generated one of the world’s biggest humanitarian and food crisis. Security and defence policies, whether regional or continental, have shown to be powerless when facing these realities. The failures of these policies are due to disagreements between Heads of State and to the lack of financial resources within States, the African Union and its sub-regional agencies such as IGAD and COMESA. By studying the case of Djibouti we will prove that national security policies have been weakened by corruption, clientelism and tribalism, which has lead to the insurgence of the impoverished population. Because Djibouti is one of the most stable States in the region, it serves as a barometer that measures new treats to the stability of the zone. As a neighbouring country to the hotbeds of terrorism and piracy, Djibouti is where the French, the American and the Japanese have settled their military bases; it has also consequently become the target of terrorist groups. The military bases have certainly improved the security and the economy of the area but they have also had a negative impact on its social environment.

The current international system with its emphasis on state sovereignty was designed to restrain interference in domestic affairs by other states. However, this notion has been repeatedly challenged throughout the past 70 years by states intervening with military instruments in internal armed conflicts. Possible motives that led states to jeopardize the lives of their soldiers and convinced them to bear the costs of interventions have engendered a rich debate in the studies of International Relations and Peace and Conflict Studies. In this dissertation, two arguments based on the logic of the realist theory of international relations are brought forward to augment our understanding of factors contributing to military interventionism. First, it is shown that economic linkages between states transcend the debate on trade and include the effects of foreign direct investment on their willingness to intervene by force. Corporate investment is shown to significantly raise the willingness of states to intervene when existing FDI is endangered by the dynamics unfolding during internal armed conflicts. Second, great powers are apt to harness other states to alter the conflict dynamics in civil wars. Applying the principal-agent framework in combination with the logic of arms trade allows identifying unequal...

This thesis aims to explore selected theoretical approaches investigating the causes of conflicts on the African continent and then try to apply it to the particular case of the Democratic Republic of Congo and its second war, running from 1998-2003, and then assess the impact of each selected causes of this particular Congolese conflict. This Work in the first chapters outlines the chosen theories related to the causes of armed conflicts in Africa, focusing on three selected causes of conflict: natural resources, ethnicity and weak state. These chapters are theoretical basis for the analysis found in the final chapter. It then evaluates the impact of chosen variables on the outbreak of the Congolese war. Based on the analysis the author draws the following conclusions: 1st the main cause of the second war in the DRC, running in the years 1998 - 2003, can be considered as raw materials, or the efforts of rebel groups and neighboring countries to control and subsequent illegal mining of mineral wealth of The Congo; 2nd although ethnic factors are not the main cause of the second Congolese war, their impact on the conflict, especially in the early days of the conflict is obvious; 3rd nature of the State, namely the weakness of the Government of DRC, ranked according to key indicators, turns out to be the most...

Au courant des dernières années, les chercheurs s’intéressant aux guerres civiles ont proposé une multitude de théories pour expliquer pourquoi les groupes rebelles en viennent parfois à cibler les populations civiles. Malgré cette abondance théorique, notre compréhension des processus et des mécanismes menant les combattants de rang inférieur à participer à cette violence demeure, étonnamment, très limitée. Cette carence est en partie due au fait que les travaux existants reposent souvent sur des postulats implicites – et parfois infondés – à propos des combattants se situant au bas de la hiérarchie militaire et qui sont ceux qui mettent en œuvre la violence envers les civils sur le terrain. Ainsi, certaines questions importantes sur les micro-déterminants de la violence au sein des groupes rebelles demeurent, à ce jour, sous-étudiées dans la littérature sur les guerres civiles. Cette thèse pose donc la question suivante : comment les combattants rebelles en viennent-ils à tuer des civils non-armés durant les conflits intra-étatiques? Mobilisant des méthodes mixtes (i.e. analyses statistiques et études de cas) et explorant une variété de cas empiriques, cette thèse puise dans la sociologie et la psychologie pour soutenir que la participation des combattants rebelles à la violence envers les civils peut être comprise comme étant le fruit d’un processus de socialisation. Spécifiquement, la thèse conceptualise cette participation comme découlant des puissants besoins, sanctions, contraintes, influences et incitatifs sociaux auxquels les combattants font face – et qui deviennent souvent prépondérants – durant les guerres civiles. Au fil du temps, ces forces sociales façonnent les dispositions attitudinales et les tendances comportementales des combattants, motivant chez ceux-ci la recherche d’un alignement par rapport aux normes et aux attentes de leurs dirigeants et de leurs pairs. Bien que les trois articles qui forment cette thèse abordent des sujets distincts, ils sont tous informés et unis par ce cadre théorique. Le premier article de la thèse synthétise les théories existantes sur la socialisation des combattants et les incorporent dans un modèle intégré, qui distingue cinq trajectoires pouvant mener ceux-ci à la violence. Ce faisant, l’article spécifie les principaux mécanismes socio- psychologiques au travers desquels les dynamiques de socialisation peuvent encourager la participation à cette violence. Sur cette base, l’article illustre la valeur ajoutée de ce modèle en explorant les trajectoires vers la violence des combattants rebelles durant la guerre civile au Sierra Leone. Le deuxième article explore la manière dont le contexte opérationnel au sein duquel les combattants évoluent peut façonner la nature des influences de socialisation auxquelles ils sont exposés. S’intéressant aux variations entre et au sein des groupes rebelles utilisant des tactiques de guérilla, l’article soutient que le degré « d’intégration opérationnelle » (operational embeddedness) de ces groupes au sein des populations locales influence de manière importante le type de relations que les combattants développent avec les civils. Entamant un dialogue entre les littératures sur la gouvernance rebelle et la socialisation des combattants, cet article mobilise des tests statistiques et une étude de cas qualitative (l’insurrection des Talibans en Afghanistan), mettant en lumière la manière dont l’environnement opérationnel d’un groupe affecte l’essence des dynamiques de socialisation et, par conséquent, le répertoire d’actions des combattants. Le troisième article examine comment les caractéristiques organisationnelles des « new new insurgencies » (NNIs) – tel que définies par Walter – affectent la propension de ces groupes djihadistes transnationaux à cibler les populations civiles. L’article soutient que l’idéologie de plus en plus fratricide des NNIs, le fait que leurs dirigeants ancrent leur autorité dans des sources divines et la présence de combattants étrangers radicalisés au sein de ces groupes créent de puissantes dynamiques de socialisation, qui tendront à motiver une participation accrue à la violence envers les civils. Mobilisant également des analyses quantitatives et une étude de cas qualitative (l’insurrection d’al-Shabaab en Somalie), cet article démontre que les NNIs sont associées à des taux de violence particulièrement élevés par rapport à la fois aux autres types de groupes rebelles, mais aussi aux groupes islamistes antérieurs et non-transnationaux. L’article souligne ainsi l’importance de prendre en considération l’idéologie, l’autorité et les processus de mobilisation transnationaux pour mieux comprendre le comportement rebelle. Ainsi, les trois articles brossent un portrait théorique systématique des processus et des mécanismes au travers desquels les combattants rebelles en viennent à tuer les civils durant les conflits intra-étatiques, plaçant ainsi cette littérature sur une base conceptuelle plus solide. Ce faisant, la thèse met en lumière la considérable diversité des trajectoires, l’inhérente complexité des processus menant à la violence et la fondamentale humanité des combattants rebelles. / Although the civil war literature is replete with theories purporting to explain why rebel groups wield violence against civilians, we still have a surprisingly limited understanding of the processes and mechanisms driving low-ranking combatants to participate in civilian targeting. As I argue in this thesis, this is in part because much of existing research on rebel behavior relies on implicit, unstated, or even unfounded assumptions about the flesh-and-blood individuals who carry out such violence on the ground. Accordingly, a number of fundamental questions about the perpetrators of wartime violence and the micro-level drivers of their behaviors have remained largely under-addressed in the scholarship on civil war violence. This thesis thus asks the following question: how do low-ranking rebel combatants come to kill unarmed civilians during intrastate conflicts? Leveraging mixed methods that combine statistical analyses with case studies and exploring a variety of empirical cases, the thesis draws from the conceptual repertoire of sociology and psychology and contends that violence perpetration can best be understood as a socialization process. Specifically, I conceptualize participation in violence against civilians as deriving from the potent social influences, needs, incentives, sanctions, and constraints that rebel combatants experience – and which often become overriding – in the midst of civil wars. In turn, these powerful social forces progressively shape combatants’ attitudinal dispositions and behavioral tendencies, creating strong pressures for them to seek alignment with the violent norms and expectations of their leaders and peers. While the three articles that form this thesis tackle different topics, they are informed and united by this overarching theoretical approach. In the first article, I synthesize existing theories of combatant socialization and combined them into an integrated framework, which charts five key pathways toward civilian targeting. The article also specifies the main underlying socio-psychological mechanisms through which socializing influences motivate participation in such violence. It then illustrates how these pathways map onto the actual experiences of civil war combatants by examining the drivers of individual participation in violence during the Sierra Leone Civil War. In the second chapter, I explore how the environment in which rebel combatants operate can affect their repertoire of action by shaping the nature of the socializing influences to which they are exposed. Focusing on variations across and within rebel groups waging guerrilla warfare, this article argues that the extent of a group’s operational embeddedness – that is, the degree to which its operational bases are physically integrated within civilian communities – can considerably affect the type of relations that combatants come to nurture with civilians. Bridging the rebel governance and combatant socialization literatures, the article mobilizes cross-national statistical analyses and case study evidence from the Taliban’s insurgency in Afghanistan and finds strong empirical support for these arguments, highlighting the importance of the operational context in shaping socialization dynamics and, consequently, rebel behavior. In the third chapter, I examine whether the organizational characteristics of “new new insurgencies” (NNIs) – as defined by Walter – affect the extent to which these transnational jihadist rebel groups target civilian populations. Specifically, this article argues that the increasingly fratricidal ideology of NNIs, the fact that their leaders anchor their authority claims in divine sources, and the presence of radicalized foreign fighters in their membership base create potent socialization dynamics that are likely to steer combatants toward violence. Using cross-national statistical tests and qualitative evidence from al-Shabaab’s insurgency in Somalia, the article highlights that this new – and increasingly prevalent – breed of insurgents indeed tends to impose a particularly heavy toll on civilian populations, relative to both other types of rebel groups as well as earlier and non-transnational Islamist groups. The article thus emphasizes the need to account for ideology, authority, and membership when studying the determinants of rebel behavior. Together, these three articles thus offer a systematic theoretical account of the processes and mechanisms through which low-ranking rebel combatants come to kill civilians during civil wars, placing debates over the determinants of rebel behavior on a more solid conceptual footing. As a whole, therefore, this thesis advances our understanding of civil war violence by casting the focus on low-ranking combatants and by calling attention to the fundamental diversity of their trajectories, to the inherent complexity of the perpetration process, and to the basic humanity of perpetrators of political violence.

Research has begun to focus on the role third-party diplomatic intervention plays in the length of civil conflicts. Diplomatic interventions by a third-party actor are assumed to help resolve or alleviate violence over time. Is this really the case? Hypotheses relating to these aspects of civil wars are proposed to test this long-standing assumption. This thesis uses statistical analysis to observe the relationship between diplomatic interventions and civil war duration and then observe the relationship between duration and civil war violence. The data incorporates approximately 150 civil wars from 1945 to 1999, 101 of which had outside interventions. This thesis finds that, contrary to ex ante expectations, diplomatic interventions are a significant contributing factor to civil war length. Furthermore, longer civil wars are not associated with more civil war intensity in the aggregate, suggesting that longer civil wars do not mean more violent or intense ones.

In 1994 Ethiopia introduced a federal system of government as a national level approach to intra-state conflict management. Homogenisation of cultures and languages by the earlier regimes led to the emergence of ethno-national movements and civil wars that culminated in the collapse of the unitary state in 1991. For this reason, the federal system that recognises ethnic groups¿ rights is the first step in transforming the structural causes of civil wars in Ethiopia. Against this background this research examines whether the federal arrangement has created an enabling environment in managing conflicts in the country. To understand this problematic, the thesis conceptualises and analyses federalism and conflict management using a qualitative research design based on in-depth interviewing and content-based thematic analysis ¿ taking the case study of the Benishangul-Gumuz regional state. The findings of the study demonstrate that different factors hinder the federal process. First, the constitutional focus on ethnic groups¿ rights has led, in practice, to lessened attention to citizenship and minority rights protection in the regional states. Second, the federal process encourages ethnic-based elite groups to compete in controlling regional and local state powers and resources. This has greatly contributed to the emergence of ethnic-based violent conflicts, hostile intergovernmental relationships and lack of law and order along the common borders of the regional states. Third, the centralised policy and decision making process of the ruling party has hindered genuine democratic participation of citizens and self-determination of the ethnic groups. This undermines the capacity of the regional states and makes the federal structure vulnerable to the dynamics of political change. The conflicts in Benishangul-Gumuz emanate from these causes, but lack of territorial land use rights of the indigenous people and lack of proportional political representation of the non-indigenous people are the principal manifestations. The research concludes by identifying the issues that determine the sustainability of the federal structure. Some of them include: making constitutional amendments which consider citizenship rights and minority rights protection; enhancing the democratic participation of citizens by developing the capacities of the regional states and correcting the organisational weakness of the multi-national political parties; encouraging co-operative intergovernmental relationships, and maintaining the territorial land use rights of the Benishangul-Gumuz indigenous people. / Addis Ababa University

Abstract: What explains the use of violence in extra-institutional political campaigns? Domestic groups challenge host states using both nonviolent and violent tactics. While Gandhi’s struggle for India’s independence is perhaps the most famous example of nonviolence, many of today’s bloody civil wars also started out as nonviolent movements. In a world eager to support the self-determination of marginalized groups, both nonviolent and violent groups receive support from foreign actors. Despite this, theories on the use of violence by these groups remain untested empirically.  This paper uses panel data to quantitatively investigate the proposition that external support of extra-institutional political movements causes an increase in the use of violence. A logistic regression model finds no statistically significant relationship between the provision of external support and an increased use of violence in primarily nonviolent campaigns. An additional test on a sample of violent non-state groups finds that battle-related deaths increased when external support was provided in the previous year, a result significant at 99% confidence.

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