Once Before I Die is a 1966 war drama starring Ursula Andress and her husband John Derek, who also directed. The film was based on a 1945 novel Quit for the Next by Lieutenant Anthony March.
Shortly after Pearl Harbor, the Japanese attack the Philippine islands. A group of poloplaying soldiers of the 26th Cavalry Regiment United States and their families are surprised far off in the countryside. Major Bailey John Derek leads them back to Manila, but the roads are jammed with fugitives.On the trip, Baileys fiance Alex Ursula Andress talks with a young shy soldier Rod Lauren who tells her of his fears to die and admits that he has never been with a woman. Only once before he dies, he would like to have sex. ........
Source: Wikipedia