Rambo accepts but quickly discovers that the bureaucrat running the operation, Marshall Murdock, never intended for him to find anything. When Rambo defies orders and rescues a suffering POW, Murdock abandons him behind enemy lines. Captured and brutally tortured by Soviet forces assisting the Vietnamese, Rambo manages to escape with the help of his local contact, Co Bao. After Co Bao is killed by enemy fire, Rambo snaps and wages a brutal, high-octane one-man war to eliminate the enemy and bring the abandoned soldiers home. Rambo: First Blood Part II (1985) - Plot - IMDb
Comparing the by James Cameron.