The Myth of The Manawell
Warchief Thrukk was an Orc who lead the Orc and Troll rebellion against The Kingdom of Bronze and its Dragonborn leaders. Thrukk was able to defeat the Dragonborn through low cunning and numerical superiority, eventually leading to the collapse of The Kingdom of Bronze. Celebrating in their successful toppling of their former masters, Thrukk advised them to continue the war, and assault the Dwarves within The Shezna Mountains.
The Orc and Troll army was soundly repelled and crushed by the Dwarven defenders, and as such retreated back to The Zundrammal Desert. The other Orcs blamed Thrukk and cast him out. This was hundreds of years ago, and in the intervening time no other Orc or Troll has had the martial skill to wage another war.