Government and Military Campaigns
Kangxi was a skilled archer and horseman and a hard-working administrator. He read the memorials sent to him by officials himself and corrected them in his own hand, and he took pride in the attention he paid to the business of state.
The Revolt of the Three Feudatories
After the conquest of 1644, large territories in the south and southwest had been left to three Ming generals who had gone over to the Qing: Wu Sangui, Shang Kexi and Geng Jingzhong. By 1673 these feudatories were effectively independent states. Against the advice of many of his ministers, Kangxi accepted their offers to retire, and Wu Sangui responded by rebelling. Shang Zhixin and Geng Jingzhong joined him, as did the general Wang Fuchen in the northwest.
The war lasted eight years. Wu Sangui's forces overran much of southern and southwestern China before the tide turned. Kangxi relied heavily on the Han Chinese troops of the Green Standard Army, with the Manchu banners in a supporting role, and he offered pardons to rebels who surrendered. The last resistance ended in 1681.
Taiwan
Taiwan was held by the Zheng family, heirs of the Ming loyalist Koxinga. In 1683 the Qing admiral Shi Lang destroyed the Zheng fleet off the Penghu islands, and Koxinga's grandson Zheng Keshuang surrendered soon afterwards. Taiwan became part of the Qing empire.
Several Ming princes had taken refuge on the island. Most were sent back to the mainland, but Zhu Shugui, Prince of Ningjing, took his own life rather than submit, and his concubines died with him. His residence was converted into a temple to the sea goddess Mazu, a gesture intended to win over the island's population.
Russia
Russian settlers had been pushing into the Amur River region since the middle of the century. In the 1680s Kangxi sent forces against the Russian fort at Albazin, and after fighting and long negotiations the two empires signed the Treaty of Nerchinsk in 1689. It fixed the border and was China's first treaty with a European state.
Mongolia
The Chahar Mongols had submitted to the Qing in the 1630s, and their princes were closely tied to the imperial house by marriage. In 1675, while the Three Feudatories were in revolt, the Chahar prince Burni rose against the Qing. The rising was crushed within two months, the Chahar ruling line was destroyed, and the Chahar were placed under direct imperial control rather than the autonomy enjoyed by other Inner Mongol groups.
The Wars with the Dzungars
In 1688 Galdan, ruler of the Dzungar Khanate in the west, invaded the lands of the Khalkha Mongols. The Khalkha nobility and their spiritual leader, the Jebtsundamba Khutuktu, fled across the Gobi and placed themselves under Qing protection. Qing forces fought Galdan at Ulan Butung in 1690, and in 1696 Kangxi personally led a campaign in which the western army under Fiyanggū defeated him at Jao Modo. Galdan died the following year.
Tibet
Kangxi also drew Tibet into the Qing orbit. The Tibetan regent Sangye Gyatso had concealed the death of the Fifth Dalai Lama in 1682 for many years and was on good terms with the Dzungars, which angered the emperor. Sangye Gyatso was later killed by the Khoshut Mongol ruler Lha-bzang Khan, whom Kangxi supported.
In 1717 the Dzungars invaded Tibet, took Lhasa and killed Lha-bzang Khan. A Qing army sent against them was destroyed near the Salween River in 1718. In 1720 a larger expedition drove the Dzungars out and brought Tibet under Qing protection.