Second Korean war (Korean DMZ Conflict) Vietnam era (1966-69). Its very rare to see a decorated named jacket like this from this forgotten conflict where many American's served and lost there lives.
I have never seen another my self. The Jacket has an awesome looking Skull and Crossbones patch and a lighting patch from the 38th Air Defense Artillery Brigade. The Jacket has the name Mergy on it and Hamilton on the back which I believe is the Town he was from (Hamilton Ohio).It has Dragon embroidery on the sleeves and a Eagle patch on the back that says US Army and it says Korea 68-69. The jacket is not sized nor can I find makers marks on it other than "Crown" on the zipper.
The size would be close to a Medium or Small in todays standards. It has some small pin holes and a larger one on the elbow and some bleaching spots on the back but over all great condition for its age.