The Yuan dynasty was founded by the Mongols in the traditional Chinese style in 1271. The Yuan dynasty was characterized by Sino-Mongol expansionism, and Yuan China undertook attempts to conquer other territories. The Yuan dynasty launched two invasions of Burma, with the first invasion delivering a devastating blow to the Pagan Kingdom and effectively resulted in its collapse. Furthermore, the Yuan dynasty also managed to conquer Korea. The Yuan dynasty also had great success in conquering Tibet, thus incorporating Tibet into Chinese territory for the first time in history. However, the Yuan dynasty had been unsuccessful in its attempt to conquer Vietnam and its naval expeditions to invade Java and Japan had disastrous results, eventually leading to the end of Sino-Mongol expansionist desires.