Senjou no Ookami II was released in March 1990 in Japan. It is known outside Japan as "Mercs
The title of this game translates from Japanese as 'Wolf of the Battlefield II'.
Pony Canyon / Scitron released a limited-edition soundtrack album for this game (G.S.M. Capcom 3 - PCCB-00030) on May 21, 1990.