I am looking for maps for Heroes III.

Help me remember a map for the third installment of Heroes of Might and Magic. I played it about 20 years ago. On the map, you can't build units or develop a town; you start the game with one swordsman, then an archer joins, followed by a dwarf, and as you progress through the map, more troops join. I don't remember how it ended, even though I played it; it was a fantastic map that I really enjoyed.