The key event in 1945 that marked the end of World War II in Europe was the unconditional surrender of Nazi Germany on May 7, known as V-E Day (Victory in Europe Day). Following years of intense warfare, Allied forces successfully invaded Europe, leading to the liberation of occupied territories and the collapse of Hitler’s regime. Hitler's suicide on April 30, 1945, further weakened German leadership, prompting military leaders to negotiate surrender. The official end of combat operations in Europe was a significant milestone, celebrating the defeat of fascism but also marking the beginning of post-war reconstruction and the onset of the Cold War divisions.