Question

the main goal of the allied leaders at the potsdam conference was to
find a way to.force germany to surrender.
finalize the decisions made at yalta.
make plans for the united nations.
agree on strategies to defeat japan.

Explanation:

The Potsdam Conference took place after Germany's surrender. Its main focus was on post - war issues and strategies regarding Japan. The Yalta Conference decisions were further refined here, but the overarching goal related to Japan's defeat. The United Nations plans were mainly developed elsewhere.

Answer:

agree on strategies to defeat Japan.