Omashu is the second largest city in the Earth Kingdom and the capital of one of its provinces. Only Ba Sing Se, the titanic capital of the Earth Kingdom, is larger. It was one of the last great strongholds of the Earth Kingdom and a supplier of men and weaponry before its fall in the months before the end of the war. Omashu is located in the Kolau Mountain Range in the southwestern Earth Kingdom. The city is built on a number of hills, and is surrounded by a wide gorge. Omashu is heavily fortified.