During world war ii, were the united states and the soviet union both allied powers, both axis powers, or on opposite sides?

what future plans did roosevelt, stalin, and churchill agree upon at their meeting at yalta?

what was the purpose of the united nations?

what did the un charter do?

how did the experience of world war ii cause the soviet union to seek security?

what did soviet leaders expect would happen to communism and capitalism over time?

how did the soviet union react when the western allies announced plans to combine their german occupation zones into a new west german state?