Operation White Star (also known as Project White Star) was the code name for a United States military advisory mission to Laos during the first years of the Second Indochina War, which would eventually become known in the United States as the Vietnam War. The purpose was to train the Royal Laotian Army as well as indigenous Hmong, and Yao tribesmen to fight the Pathet Lao communist insurgency. This was later extended to include combat against the North Vietnamese Army, which was increasingly using Laos as a staging, transit and resupply area for its operations in South Vietnam.