Vintage 1980’s U.S Army military Olive Green Khaki Jacket cotton 42” chest size L

Purchased this is the early 00’s from a vintage shop. Considering the age it’s in lovely condition but does show signs of wear. Lots of pockets, buttons, little breathing holes under the arms. Inside pocket has labels in it with some kind of details. There is a mark on each sleeve where rank/regiment? patches had been attached and then removed. Cuff has two different buttons so you can choose how wide you want the cuffs. Label in the back says size 2??? Measurement are; 21.5” armpit to armpit 18” across the shoulder Roughly 42” chest Please check these measurements as no actual size on the garment From a smoke and pet free home