In Bloodsport (1988), when Frank's superiors find out he is going to Hong Kong to fight in the Kumite, they try to stop him. He evades Helmer and Rawlins (the agents who were sent to bring him back home) and gets to Hong Kong anyway, where Helmer and Rawlins try again to stop him and bring him back.
Why? "The US Governemnt has invested a lot of time and money into you and we don't want you getting hurt". What does that mean? Dux is a Captain which isn't low rank, but it isn't like a General. So why is he so special that they want to keep him from participating in the Kumite?