Iron War

From 3,023 to 3,020 AS the Iron War was waged between goblins and gnomes. It was a war fought primarily to prove their own technical dominance, which were each massive. Massive battlewalkers and all other sorts of war machines strode or crawled across the battlefields, killing goblins and gnomes alike in huge, deadly bursts. The technology for the machines was lost in the Sundering, but remnants of some of them survived.