OK, so joking and banter aside I received an email from a civi mucker a while back who asked "if the US has deployed the 101st airborne to XYZ, does this mean there are another 100 units elsewhere and if so, how come I've only ever heard of the 101st and 82nd?). Which I was able to answer, e.g., they've two, one airmobile and one with parachutes but of course the main thrust of the question, was there ever 100 other units, or did they start counting at 101 as part of opsec? or whats the story? Is 10th Mountain division the remains of 1st, 2nd, 3rd mountain etc... Where do they get their numbering from? And why? Actually, I'm bored so banter is welcome..