The USO was in Vietnam before the first combat troops arrived, with the first USO club opened in Saigon in April 1963. The 23 centers in Vietnam and Thailand served as many as a million service members a month, and the USO presented more than 5,000 performances during the Vietnam War featuring stars such as John Wayne, Ann-Margret, Sammy Davis Jr., Raymond Burr, Phyllis Diller, Martha Raye, Joey Heatherton, Wayne Newton, Jayne Mansfield, Redd Foxx, Rosey Grier, Anita Bryant, Nancy Sinatra, Jimmy Hawkins, Jimmy Boyd, Lola Falana, George Peppard and Bob Hope. Philip Ahn, the first actor of Korean descent to become a Hollywood star, became the first Asian American USO performer to entertain troops in Vietnam.