What event marked the end of World War II in Europe?

The fall of Berlin marked the end of World War II in Europe, as it directly led to the unconditional surrender of Nazi Germany. The capture of Berlin by Allied forces in May 1945 represented a significant military victory, as it was the capital of Nazi Germany and the site of key operations during the war. Following intense fighting, the fall of the city signified the collapse of the German government and the defeat of the Axis powers in Europe.

This event was pivotal in bringing an end to the European theater of the war, as it set in motion the final surrender announcements and the subsequent formalities that occurred shortly thereafter, including the signing of the German Instrument of Surrender on May 7, 1945. The other options relate to important events during the war but do not signify the actual end of the conflict in Europe. For instance, the D-Day invasion was crucial for the Allied liberation of Western Europe, while the bombing of Hiroshima occurred after the war had ended in Europe and was specific to the Pacific theater. The Treaty of Versailles, on the other hand, was signed at the end of World War I, not World War II.