Operação MX-1 (1981)

Most likely the first "real" wargame (by today's standards) released in Brazil, it had lukewarm reception during the 80's and has been discontinued.
The game simulates a battle between two fictitious armies, using an hexagonal board and two sets of rules: basic and advanced.
This is the same Avalon Hill's Tactics II (1958), with a redesigned hexgrid mapboard.