The document summarizes major events from the end of World War 1 through the early 1940s that led to the start of World War 2. It describes how the Treaty of Versailles imposed harsh terms on Germany after WWI, fueling German resentment. In the 1930s, dictators in Germany, Italy, and Japan pursued aggressive expansionism and ignored treaty obligations, facing little resistance. Hitler remilitarized the Rhineland, annexed Austria and Czechoslovakia, and signed a pact with the Soviet Union before invading Poland in 1939, launching World War 2.