The 40th Infantry Regiment is a United States Army infantry unit that has served since its activation on March 17, 1916. Originating from the California National Guard, it was federalized during World War I and continued to serve in various roles throughout the 20th and 21st centuries. The regiment is part of the 40th Infantry Division (ID) and has been deployed in significant conflicts such as World Wars I and II, the Korean War, and more recently in Afghanistan and Iraq. Known for its motto “Victory or Death,” the 40th Infantry Regiment maintains a strong legacy of service and commitment to upholding the principles of the U.S. Army.