in terms of winning the war, which outcome from the Yalta conference was most essential

The agreement to allow the Soviet Union to continue to occupy Poland

The agreement to have the Soviet Union participate in the United Nations

Agreement to allow the Soviet union to take over one of the zones of occupation

The agreement to have the Soviet union join other allies in the war against Japan

The agreement to have the Soviet Union participate in the United Nations was the most essential outcome from the Yalta Conference in terms of winning the war. This allowed for a united front against Japan and ensured that the major Allied powers would work together in postwar reconstruction and global efforts for peace and security.