This high school American history lesson describes the increasing tension of the Cold War from the end of World War II through the Cuban Missile Crisis in the early 1960s. It includes a brief description of the major events during the period that increased the tension between the United States and the USSR. The lesson also includes maps, timelines, and pictures relevant to the lesson. The relevance page includes a link to "Duck and Cover" so that students better understand the existential threat posed by the USSR during the Cold War. Students will read the text and complete a graphic organizer followed by a series of relevant questions related to the topic.