MacCentral got their hands on Myth II: Green Berets and wrote a brief overview of the game.

Billed as a squad-level tactical strategy game, the title puts players in the jungles of Southeast Asia. Green Berets features ten different missions with varying goals like rescuing POWs, sabotaging enemy communications, and destroying supply dumps. Players control squads comprised of gunners, medics, grenade launchers, helicopters and more -- a total of more than 18 units.

There's slightly more general information available in the overview.