The founding in 1941 of the United Services Organizations (USO) to provide live entertainment to members of the United States Armed Forces and their families saw celebrity movie stars and singers perform for military service personnel in the Second World War, and later in Korea and Vietnam. Troops were also entertained during the Gulf War. It's a tradition that continues today, with big name stars following in the footsteps of celebrities from yesteryear and happy to do their bit to boost morale and help raise a smile.
Click through for a nostalgic look back at the stars who have entertained the troops.