Universal Soldier

John Rambo is released from prison by the government for a top-secret covert mission to the last place on Earth he'd want to return - the jungles of Vietnam.

When a virus leaks from a top-secret facility, turning all resident researchers into ravenous zombies and their lab animals into mutated hounds from hell, the government sends in an elite military task force to contain the outbreak.

A blind Vietnam vet, trained as a swordfighter, comes to America and helps to rescue the son of a fellow soldier.

A Vietnam veteran, Charles Rane, returns home after years in a POW camp and is treated as a hero. He has a hard time adjusting, and things go badly. A movie about the walking dead, before that meant just flesh-eating zombies.