1982年4月2日，阿根廷入侵福克蘭/馬爾維納斯群島，震驚英國朝野。時任首相的柴契爾夫人在4月7日成立戰爭內閣，並決定出兵奪島，不到三個月的時間，英軍於6月14日克復福克蘭/馬爾維納斯群島，阿根廷戰敗，聯合軍政府總統加爾鐵里下台。 柴契爾夫人的領導風格揉合法理型及卡理斯瑪式的支配型權威，以及轉換型的領導方式，在處理這場危機時掌握快速反應及賦予危機定義的要領，指出阿根廷入侵已危害英國的基本利益，一面派遣特遣隊開赴戰場，同時以外交談判方式拖延掩護特遣隊行蹤。阿根廷駐軍雖是以逸待勞，但軍隊指揮調度的反覆埋下戰敗的禍根，軍政府想要移轉國內焦點的動機並未如願，反而加速本身的崩解，開啟民選政府的扉頁，阿方辛成為戰後首位民選總統。 英國在戰爭之後有意與阿根廷恢復正常的外交關係，與90年代阿根廷梅南上台後以發展經濟為主的外交政策不謀而合，在主權保護傘的前提下共同開發與勘探油氣。但到了2001年德拉魯阿上台後一改外交政策，強調阿根廷擁有福克蘭/馬爾維納斯群島的主權，歷經多位總統至今仍維持一貫的基調。而英國自2010年國家安全戰略報告發表後，確立保障該群島島民安全與自決的權利，促成2013年島民決定政治地位的公投，結果是壓倒性的贊成票決定仍由英國管轄，英阿爭議依舊紛擾。 / On 2 April 1982, UK was stunned with the news that Argentina had invaded the Falkland/Malvinas islands. Prime Minister Margaret Thatcher set up the war cabinet rapidly at 7 April and decided to dispatch the military to take the island back. In three months, the British military recovered the Falkland/Malvinas islands on 14 June, Argentina was defeated, President Leopoldo Galtieri stepped down. The leadership of Thatcher was composed of legal-rational authority and charismatic authority, as well as transformational leadership. When she faced the crisis she realized the essentiality of the fast-reaction and make-a-definition-to-the-crisis, so she accused the invasion had undermined the Britain's interest and dispatched the armed forces to the battlefield, at the same time used diplomatic negotiations to cover up the military actions. On the other hand, Argentina's military had the advantage of having the island under their control, but the advantage was undermined with the change in command, which eventually lost the war. The Junta not only failed to shift the focus of the society, but also dug its own grave. After the collapse of the Junta, Raúl Alfosin the elected president, and started a new era of Argentina. After the war, the UK intended to normalize the relationship with Argentina. That coincided with the diplomatic policy of President Carlos Menan in the 90s, whose main focus was developing the economy. Under the sovereign umbrella, UK and Argentina cooperated and exploited natural gas and oil in the sea surrounding the Falkland/Malvinas islands. Until 2001 Fernando de la Rua was elected and changed the diplomatic policy to emphasize Argentine’s sovereignty over the Falkland/Malvinas islands. That policy was consistently upheld by several presidencies afterwards. Nevertheless, with the promulgation of the "National Security Strategy", UK assured to safeguard the islanders' safety and the right of self-determination. A referendum was facilitated in 2013 on the Falkland Islands. An overwhelming 90% of voters chose to remain as UK territory. The dispute is still unsettled.