Conversation so far:
who was the us president when the united nations was formed
President Harry S. Truman signed the United Nations Charter and the United States joined the new international organization on August 8, 1945.
how did president roosevelt come up with the name, united nations
Roosevelt first coined the term United Nations to describe the Allied countries in World War II and he suggested United Nations as an alternative to the name Associated Powers.
who were the axis powers during world war 2
Axis powers were a coalition headed by Germany, Italy, and Japan that opposed the Allied powers in World War II.

Question: what did the powers do during the war
Self-contained rewrite: what did the axis powers do during world war 2