Final answer:
Harry Truman led the United States to victory in the final months of World War II.
Step-by-step explanation:
The leader who led the United States to victory in the final months of World War II was Harry Truman. He became the 33rd president of the United States in April 1945 following the death of Franklin D. Roosevelt. Truman inherited a significant responsibility as he stepped into the presidency just as the Allies were moving toward the final defeat of the Third Reich.
Through a series of strategic decisions and successful military campaigns, he helped guide the Allies to victory. On May 8, 1945, known as V-E Day (Victory in Europe Day), the German armies surrendered unconditionally, signifying the end of the war in Europe.