Board Thread:General Mod Discussion/@comment-26486187-20160925013413/@comment-28792040-20160928001503

On a 1 on 1 matchup, Khazad-Dûm would likely have many victories against Mordor before its withdrawal and eventual stalemate. This is mostly due to the fact that Sauron could mass-produce his Orcs and Uruks while the dwarves reproduced extremely slowly. Although they would have superior weaponry, Mordor would eventually wear the Dwarves down. And in essence, this is what happened in the lore. Khazad-Dûm slowly began to take casualties; first in the fall of Eregion and second in the War of the Last Alliance. By the time of the fall of Arnor, Khazad-Dûm had failed to reproduce so much that it was practically deserted and a single Balrog was enough to destroy it.

I think that Khazad-Dûm  and Mordor would enter an essential Stalemate because the creatures of Mordor would be unable to breach the Bridge of Khazad-Dûm. Even if Sauron came himself with the Ring, the dwarves would most likely be able to choke his forces at the Bridge and knock him off somehow.

Needless to say Erebor and most other Third-Age realms wouldn't be much of a match for Mordor's forces. Erebor had an extremely small population compared to Khazad-Dûm. It would be essentially a battle between 10,000 dwarves and hundreds of thousands of Mordor's troops.