Genuine US Military issue
These shirts were worn during 'War Games' (training excersises) by US Army personnel posing as opposition force (OpFor) or 'Aggressors'. The bright emerald green colour was implemented on uniforms to make it easier to differentiate between friendly forces and foes. Other uniform components were also issues which varied from the general issued uniform of the era.
Shown in the last photo are men posing as OpFor for a wargame - They wear aggressor helmets with a notable crest and other uniform components including these shirts under their unique field jackets.
Excellent condition with light signs of real wear - All buttons, fittings and fixtures are present and working. The contract label is present and mostly legible. There are some very light sporadic stains as shown.