The War Powers Act of 1941, also known as the First War Powers Act, was an American emergency law that increased federal power during World War II. The act was signed into law by U.S. President Franklin D. Roosevelt on December 18, 1941, less than two weeks after the Japanese attack on Pearl Harbor. The act was similar to the Departmental Reorganization Act of 1917 as it was signed shortly before the U.S. engaged in a large war and increased the powers of the U.S. Executive Branch.
The act gave the president enormous authority to execute World War II in an efficient manner. The president was authorized to reorganize the executive branch, independent government agencies, and government corporations for the war cause. With the act, the president was allowed to censor mail and other forms of communication between the United States and foreign countries. The act and all changes created by its power were to remain intact until six months after the end of the war at which time, the act would become defunct.