Final answer:
The Tehran Conference in 1943 was focused on coordinating military strategies against the Axis powers and included discussions on opening a second front in Western Europe.
Step-by-step explanation:
In 1943, the leaders of Great Britain, the Soviet Union, and the United States held their first significant wartime meeting in Tehran. The focus of that meeting was to coordinate military strategies against the Axis powers, particularly regarding the agreement to open a second front in western Europe. Other topics included Stalin's agreement to assist in the war against Japan once Germany was defeated, the post-war borders of Poland, economic support for Iran, and encouraging Turkey to join the Allies. While there was also some discussion of postwar planning and the foundations for what would eventually become the United Nations, the primary wartime focus remained on defeating Nazi Germany.