During the war, the only military formations larger than the army group were the military regions, which were defined by geographical boundaries, and the army corps, of which only four were formed and only during the Battle of Wuhan.They were roughly equivalent in size to an Army in British or American military terminology.By the end of the war with Japan, 40 army groups of China were in existence.The civil war saw three additional army groups being formed, even as they were gradually being replaced by newly formed army corps, by then a largely analogous formation.Commanders killed in action are denoted by † Three army groups were established and disbanded during the Chinese Civil War with the communists.