On a serious note, the standard camo, at least before applying y’know…paid-for-camo should reflect the expected turf the tanks would be fighting on, so I can understand that khaki wannabe variation.

As for the later tanks in the tier…since the ‘muricuns were so giving with the Japs during that time, they gave them a lot of presents, such as Fatman, Little boy, and, after the war, when they became allies and went after NK in the ’50s, they most likely gave them plans and/or pointers regarding the Pattons they were using in that time.

Since by that time, the Allies also included Germany, you can guess where the german tech came from too :).

^—-this, by the way is merely speculation but it’s logical to me, open for debate :)