Look inside all of the pockets for a tag or stamps. The clamores are usually a U.S. emblem. The stars look like they might be Chinese, Taiwanese, or another Asian country near the 'Nam. The uniform has a Wehrmacht feel to it. A lot of countries mimicked the German Wehrmacht uniform and helmet designs in the 30's, including the pre-commie Chinese army. I've seen photos of Chinese soldiers that look like they are in German uniforms, but they're fighting the Japanese.
The red backing on the collars lean toward a communist country. The jacket also looks like a synthetic blend - most WWII uniforms were either cotton or wool. So, it may be a 50's or 60's era Chinese uniform when polyester was all the rage.
