This document provides an overview of key events and terms related to the early years of World War II and the debate in the United States over intervention. It describes Germany's rapid military conquests across Europe from 1938 to 1941 using blitzkrieg tactics, Britain's resistance against German air attacks, and the growing alignment of Allied and Axis powers. It also explains how Roosevelt advocated increasing support for the Allies through policies like cash-and-carry and lend-lease, while isolationists opposed greater involvement, leading to heated debates in the U.S. The summary ends with Germany attacking U.S. ships and war seeming inevitable.