The key factors that led to the end of World War II in Europe were a combination of military, economic, and political elements. The relentless advance of Allied forces, exemplified by the D-Day invasion in June 1944 and the subsequent liberation of occupied territories, played a crucial role. Additionally, the Soviet Union's successful offensive on the Eastern Front weakened Nazi Germany's military capabilities significantly. Economic exhaustion and dwindling resources for the Axis powers hastened their defeat. The surrender of Germany in May 1945 marked the official end of the war in Europe, influencing post-war reconstruction efforts and the geopolitical landscape of the continent.