At the potsdam conference it was agreed that germany would be divided up among four nations; us, ussr, britain, and france. These divided zones were suppose to be temporary. By 1949 the is, british, and french zones were united and became west germany: the iron curtain: It is a military organization in which its members pledge to defend each other if any were attacked: warsaw pact: Formed by the soviet union to unite militarily with me members from satellite nations (those controlled by the soviets in eastern europe) Following wwii korean once controlled by japan was divided at the 38th parallel: north korea: controlled by communists under a soviet puppet government, south korea controlled by a democratically elected government. In 1950 north korean troops attacked south korea. In response the united nations sent troops from various nations under the control of us general macarthur to defend south korea.