Pineapple Army - Vol. 1 Ch. 1 - Operation One Goshi: the Preceptor (Issue No. 1, December 6, 1988)

[MangaDex]

 

[MrMangaMeister]

This was one of the first mangas I read. Still remember how floor struck I was at the story and the use of military tactics. Something you never saw in western comics.