The TripleA bid rules are pretty simple:
Auction off the right to play with the Axis by saying “I’ll take the Allies if you give me a bid of 15 IPC…”, “No, but I’ll take the Allies if you give me a bid of 14 IPC…”, “No way, man, because I’ll play the Allies with a bid of only 13 IPC…” until someone says “OK, fine, you can play the Allies with that bid” because they don’t want to bid any lower.
However much IPC you collect with your bid, you can split any way you like among your nations, as any combination of cash and/or pre-placed units that hit the board on round 0, subject to the following restrictions:
(1) You can’t buy more than one unit per territory or sea zone
(2) You can’t place a nation’s unit in a territory or sea zone where that nation doesn’t already have at least one unit.
That’s pretty much it! You can spend your money on whatever you want, including bombers and eastern european tanks and things, but the bid is usually lower than it would be under Chicago rules, so if you do buy a bomber, that’s most of your bid right there.
Funny, the axis have a better chance to win, so it would make sense to bid an increasing amount of units to take the stronger side. I know this bid system has been around for a while, but it is seems so counter intuiative to me.
Thinking about this comment, imagining how this would go:
“I’ll play the Axis against an Allied bid of 12.”
“No way, I’ll play the Axis against an Allied bid of 14.”
“Chump change, I’ll play Axis against an Allied bid of 15.”
“All right, I’ll take the Allies with a 15 bid.”