Also, just kicked the Germans' asses back to Europe in the new battle scenario as the Fengtien Clique; encircle Shanghai, then Tsingdao, break through and anhilate Shangqing Tianguo rebels, cut through and push Germans back to Hanoi, then cut the KMT into two at Guangzhou and encircle. I would've liked to kick the Germans out of Vietnam, but jungles are just terrible to conduct offensives at, and I was running out of time to capture Changsha and Guangzhou.
I was pretty surprised when the Japanese suddenly DoW'd, although I was pretty sure I could hold them off until the rest of China moved into crush them and occupy Korea, ;P.
Either way, if the Japanese enter too late and only end up being a nuisance. If they had struck when I had just reached 100 VP for example, I would've definitely been caught up defending Manchuria and couldn't have finished the KMT off ending in a stalemate; some kind of earlier trigger so they can join in without fighting an entirely hopeless and meaningless fight. As the Fengtian at least.
It also gets annoying when the Manchurians tend to surrender a whole lot as the Guominjun as we're winning. wth, you cowards!
Also, I feel that the 1 division/province warfare from ARMA isn't that fun to play with as a purely battle scenario - there's no reserves to play around with and you're simply holding the line; I've stuck with playing as either Fengtian or as the Germans, but even then I gravitate towards Fengtian since I find managing KMT armies annoying. Possibly an event to trigger MC would be best.