Depending on your CPU, I have a AMD 2200, I often place 20 12 soldier-teams on the north, with 10 choppers, and a load of tanks and BMP's.
Do the same thing for the southern part, but make them west. Then assign all teams a search and destroy waypoint what covers a large part of the island.
Assign yourself to a team, and move to the enemy. The fun part is that you dont know when a heli, bmp,tank shows up. Nor soldiers.
Its a total war scenario, with just one objective: kill as many as you can, and stay alive.
Its real fun.
Johan