At the conference, the Allies made several important agreements, including:
- Coordinating military operations to accelerate Germany's defeat.
- Opening a second front, the invasion of Normandy (Operation Overlord), on 1 June 1944.
- Post-war territorial issues; they agreed that Poland's border would be moved westward, into former German territory, and that the Soviet Union would annex some of Poland's eastern regions.
- To punish Nazi leaders as war criminals.
The Tehran conference was a significant turning point in the war, and the agreements made there helped to ensure the Allied victory.