Final answer:
The Allies stopped the great German advance in different stages throughout World War II, including the Battle of Stalingrad and the Battle of the Bulge. The final blow came with the Allied forces crossing the German border in March 1945.
Step-by-step explanation:
The Allies stopped the great German advance that almost ended the war in different stages throughout the course of World War II. One significant event was the Battle of Stalingrad in 1942-1943, where the Soviet Red Army trapped and defeated the Germans, marking a turning point in the war in Europe. Another important moment was the Battle of the Bulge in December 1944-January 1945, where the Allied forces successfully resisted a German offensive and pushed them back.
Additionally, the final blow to the German advance came with the Allied forces crossing the German border in March 1945 and the subsequent advance of Russian forces from the east and American, British, and French forces from the west. Hitler committed sui-cide in April 1945, and Germany surrendered on May 8, 1945, ending the war in Europe.