In the same year, 1674, the Dalai Lama, then at the height of his powers and conducting a foreign policy independent of the Qing, caused Mongol troops to occupy the border post of Dartsedo between Kham and Sichuan, further annoying the Kangxi Emperor who (according to Smith) already considered Tibet as part of the Qing Empire. It also increased Qing suspicion about Tibetan relations with the Mongol groups and led him to seek strategic opportunities to oppose and undermine Mongol influence in Tibet and eventually, within 50 years, to defeat the Mongols militarily and to establish the Qing as sole 'patrons and protectors' of Tibet in their place.