From here they can build, recruit new units, and recruit heroes. Heroes move about the terrain and command the units that you recruit. They can even capture opposing towns. A player's ultimate objective is to eliminate all other players from the game by reducing their control to nil. Combat is another story.
Heroes are behind their armies and can cast magic.
Each stack has one turn per round of combat. The battle ends when one sides units are wiped out or someone retreats or surrenders. At the end of the battle, all surviving units are healed and the loser disappears from the adventure map. Heroes III is very strategic and is a great game for strategy fans.