Abstract
This thesis analyses the impact of the war in Ukraine on Denmark's position as a core NATO country following the end of the Cold War, particularly from the 1990s to post-Ukraine crisis in 2023. Initially, Denmark was modest in NATO, but after the dissolution of the Soviet Union, its strategy shifted. The country moved from a defensive stance to an active ally, increasing its involvement in NATO, reflecting changes in global politics. The study divides Denmark's NATO journey into three phases. First, from post-Cold War to 2014, Denmark's security approach and participation in international missions evolved. Next, from 2014 to 2022, Denmark responded to Russia's annexation of Crimea and changes in European security. Finally, from 2022 to the end of 2023, the influence of the war in Ukraine on Denmark's role in NATO and renewed commitment was examined. The thesis suggests that Denmark's proactive role in NATO stems from its status as a small state seeking security and influence. Denmark adeptly navigated within NATO, contributing to defence and crisis management, and enhancing its alliance status. However, this ambition faces challenges and requires ongoing assessment of alliance politics, global threats, and national capabilities. In summary, the thesis offers insights into small state strategies in alliances post-Cold War. Denmark's experiences provide lessons in balancing national security with collective defence roles and pursuing influence within an alliance.