The "=ARC= NATO Offensive" (ARC:NO) mod aims to add content to the blufor side of Arma 3. More exactly, the mod add new units and vehicles from differents NATO countries. From a technical view, this units and vehicles use the 3D models of the vanilla game with new HD textures. You have to keep in mind that this is only re-texturation, so some units will use clothes and gear which are not used IRL. The mod is splitted in "packs". (So people can take only units they wants etc.) Formely "-E3- Units" mod, so you'll be able to find the units and vehicles from the E3's Mods
US / USMC Woodland
I think the flag should be facing the other way. When the American flag is worn on a uniform, the blue corner is towards the front (in the idea that a flag being carried would be pulled backwards from the air, leaving the blue part in front)