Another option is the MiniArt US Soldiers Rainwear set (35245). The three soldiers in ponchos can become any era by changing out their boots, weapons, and helmets. The poncho hasn’t really changed since its inception. Changing to straight leg boots and M14s and they are '50s/'60s troops stateside or in Europe. New boots with camo covered helmets and M16A1s w/20 rd mags and they are '60s - early '70s troopers. New boots with camo covered steel pot helmets with M16A1 w/30 rd mags and they are early '80s troopers. New boots with camo covered Kevlar helmets with M16A1 w/30 rd mags and they are late '80s troopers. New boots, Kevlar helmets and M16A2 and they are '90s troopers. Etc., etc., etc… The possibilities are endless.
The two guys in raincoats could be updated to about the '50s with straight leg boots, M14s, and new helmets as well. The raincoat was used up until that timeframe.