After Garrosh Hellscream redirected the Dark Portal to the world of Draenor of thirty years past, the first regiment joined the forces of the Alliance and Horde in a daring invasion to contend with the threat of Garrosh's Iron Horde. This invasion would begin what would come to be known as the Iron War. Trudging through Shadowmoon Valley, Gorgrond, and Frostfire Ridge, the regiment was ultimately successful in beating back Garrosh's forces.

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