^
Did you get all the US commander by playing US only or was it random..?
I've been playing as only US since WFA came out and so far have only gotten US and Soviet commanders (among other things like bulletins and victory strikes). I'm now ranked 29 Prestige 1 and have been lucky enough to get all 3 US commanders.
I think I read somewhere that if you play as one faction, then the chance of you getting something for that faction goes up. But I know a lot of you on here have put in way more time than I have so I guess it all depends on how nice the RNG gods are.
Maybe there's a counter or something in the code that keeps track of when the last time you get a commander, and if you switch around then that resets? Not sure.. 100% pure speculation.