In the years just before and during World War II, the Andrews Sisters were at the height of their popularity, and the group still tends to be associated in the public's mind with the war years. They had numerous hit records during these years, both on their own and in collaboration with Bing Crosby. Some of these hits had service or military related themes, including "Boogie Woogie Bugle Boy", "Three Little Sisters", "Don't Sit Under the Apple Tree (With Anyone Else but Me)", "" and "Rum and Coca Cola". The sisters performed their hits in service comedy films like "Buck Privates" and "Private Buckaroo".