A basic action movie from the '80s but it doesn't hold up.
Plot
An American soldier with special skills gets posted to an island base where someone keeps hijacking military convoys. When his convoy gets hit, he's cooperating right up until someone hits the Colonel's daughter, and then he intervenes. His memory of his childhood is mostly gone from an explosion on an island, but he has obviously had training. When the hijackers send Ninjas after him, it becomes obvious though that his skills are way more than just simple techniques.