This Final Paper consists of analysis of NATO and EU role to Lithuanian security by identifying our days and future threats to Lithuanian security and identification of the future of the Lithuanian security policy. In the first part of this final paper was glanced through NATO and EU CFSP and DP history, highlighting problems of EU integration to Euroatlantic security. It can be assumed that more then half of continuing Cold War century NATO has assured the creation and the welfare of Eastern Europe. The collective defense remains further of one’s NATO functions, by that time EU is not responsible of European collective defense. EU stands just in crisis management. The NATO��s and EU’ intercourse problem maintains historical and national color. The second part was dedicated to analyze the evolution of Lithuanian membership in NATO, EU CFSP and DP. It was noticeable that Lithuanian NATO membership gives security to country against straight military invasion by discouraging potential threats. The EU membership gives economical sanctions to threat object just de facto i. m. after, for example, the invasion to Lithuania. But according to NATO and EU agreements, nations which belong to these organizations are allowed to choose the way of reaction so it’s might depend on relationship of each of them and Lithuania. The type and the spectrum of threats were identified in the last part and there was made an analysis which of them and in what time dimension might occur against... [to full text]