On July 1, 1097, the Battle of Doryum broke out. On July 1, 1097, the Battle of Doryum broke out. The First Crusade attacked Rumi, the capital of the Turkish-established Netherlands on July 1, 1097 (March 19, 1097) and was attacked by Arsland I of the Sultanate of Rum. Arsland I had thirty thousand (a hundred thousand), and the Crusade had more than ten thousand people (including two thousand knights). The Turkish army, which dominated the region, began to take over, but was then rapidly dispersed after being attacked by the crusader's heavy cavalry. The Turkish army was almost entirely defeated, and the Crusade killed about four thousand people. This battle cleared the obstacles for the Crus