Gaklak was the capital city of Orcainar, the only orcish kingdom in Middle-earth. Orcainar was inhabited solely by Orcs and Uruk-Hai who had turned away from Sauron and Saruman. During the War of the Ring, Gaklak was stormed by an army of Mordor but was succesfully defended. The orcs of Orcainar then allied themselves with the Free Peoples and helped them to victory against the forces of Isengard and Mordor. Orcs from Orcainar were present at the Battle of the Hornburg, the Battle of Pelennor Fields and the Battle of the Black Gate.