The Pledge of Allegiance has undergone several changes since its creation in 1892, including the addition of the words "under God" in 1954. While not mandatory until 1942, the Supreme Court first addressed reciting the Pledge in 1940, ruling students could be compelled to say it. However, in 1943 the Court reversed and found compulsory speech like this violated free speech rights. The phrase "under God" remains controversial, and the 9th Circuit has upheld the Pledge as constitutional, finding Congress' purpose was patriotic rather than religious.