Need title - 80s martial arts movie

I remember pieces of a movie i relay liked as a kid. Cant remember much about it though.

- Plot was about army buddies. I remember a fight scene in what looked like a jungle clearing with army jeeps/trucks around. In beginning a guy comes back to the unit because one of the others gets killed. It turns out it was one of the other guys from the unit.

-Probably made late 80's. Cuz i probably saw it in 1990(definitely <'92). I saw it in Poland (dont remember weather it had english subs or was translated to Polish probably). I think the picture was clear so must have been filmed in 80 at least... older movies are grainy.

I looked over what I could of IMDB movies list from that time frame and nothing even jogs my memory further.