I have a few WWII rules but none go early enough to have stats for Soviets and Japanese (and Chinese) in Manchuria 1939. Specifically Nomonhan/Khalkhin Gol, but other altercations, too.
Should include Soviet BT-5/7, T-26 (and versions), BA-6/10/20; Japanese Type 89/95/97, Type 94/97 tankettes.
Other forum mentioned Blitzkrieg Commander and Command Decision.
Any others?
Thanks