Cobra Against Ninja.

"Gordon bids goodbye to his squad of army recruits, David, Kirk, Benny and Chester. They've became best friends and they leave with the promise to stay in touch. However, they all get involved in the gambling triad run by Raymond, Russel and Ringo. When Chester's mother is murdered and sister kidnapped, he seeks revenge. " - VHS Back of the box description. Hong Kong cut and paste edit of the 1978 Thai film "ข้ามาจากเมืองนคร" (I am from Nakhon City) with new ninja scenes.