Geldan's strength at that time was indeed comparable to that of the Qing Dynasty, and Geldan had the support of Tsarist Russia, so he fearlessly opposed the Qing Dynasty. Göldan was a descendant of the Great Khan of the Mongol Dzungar Khanate, the sixth son of Batur Khentaiji, who studied Buddhism at the age of 10 in Tibet where the Panchen Lama and the Dalai Lama were, and at the age of 26 his brother Sanghakh Khuntaiji was killed in infighting among the Dzungar nobility. Gordan returned to Mongolia from Tibet, defeated his political enemies, and became the leader of the Dzungars. After Gardan seized the Dzungar rule, he implemented an aggressive policy of outward expansion. Annexed the Weyrat League and pushed the Weyrat League towards the Dzungar Khanate. After that, he conquered Kazakhstan and destroyed the Yarkand Khanate, and for a time dominated the western region, and his strength was very strong. In June 1690, Gordan had unified the Mongol tribes, and with the support of Tsarist Russia, he invaded southern Mo in the name of pursuing northern Mongolia. The Kangxi Emperor then announced that he would personally conquer Geldan. As a result, the Kangxi Emperor's troops were divided into two routes, and the Left Route Army was led by the Fuyuan general Chang Ning, out of Xifengkou, and the Kangxi Emperor personally led the troops to command in the rear.
The Qing army on the right side first contacted the Geldan army and lost the battle. Geldan drove straight in, and one of them hit Ulaanbutong, which was only 700 miles away from Beijing. When Geldan sent emissaries to the Qing army to demand the surrender of their enemies, the Kangxi Emperor ignored them and ordered Fuquan to counterattack Geldan. In order to block the Qing army's attack, Geldan concentrated his forces under the Great Red Mountain, and laid thousands of camels on the ground tied on all fours, with boxes on their backs, wrapped in wet blankets, and lined up in a line of camels. The Geldan army shot arrows and guns in the middle of the box stacks to block the Qing attack. Finally, the Qing army concentrated its artillery and aimed a fierce shelling at Luocheng, which was quickly opened a gap. The Qing infantry and cavalry charged together from the gap, and Fuquan sent troops around the back of Gordan's army to attack, defeating Gordan's army and losing their camps and fleeing. Seeing that the situation was not low, Geldan hurriedly sent a lama to the Qing army camp to seek peace. The Qing general Fu Quan could not take the lead, stopped the pursuit, and asked Kangxi for instructions. Kangxi thought that this was the enemy's strategy to slow down the army, and ordered the whole army to pursue, and not to fall into the enemy's tricks. Geldan's strategy of slowing down the army also did not work, and finally returned to the north of the desert with the remnants of the army.
Geldan returned to mobei, ostensibly showing submission to the Qing government, but secretly recruiting troops. In 1695, Gardan led 30,000 cavalry and swept eastward towards the Khalkha Mongol Chechen Khanate in the Krullen River Valley, and then descended the river. He also threatened to borrow 60,000 shotguns from Tsarist Russia and launch a large-scale attack on the south of the country. In 1696, the Kangxi Emperor, in order to relieve the threat of Geldan, sent 100,000 troops and decided to march for the second time, this time the army attacked in three ways. The Kangxi Emperor's Zhonglu Army was the first to receive information that the Russians were about to send troops to help Geldan, while the other two route armies had not yet arrived. The Qing army was a little frightened at the time, and some people also suggested that the Kangxi Emperor retreat. The Kangxi Emperor was furious at that time, and said angrily: "This expedition did not even see the rebels, how to explain to the people of the world." Besides, as soon as the Middle Route Army retreated, the rebels went all out to deal with the West Road, and the West Road was not dangerous? Therefore, the Kangxi Emperor decided to continue to advance, and the three-way army was about to annihilate the Dzungar army along the Krulun River. The Zhonglu Army led by Kangxi first reached the Krullen River and approached the Dzungar army. Gardan looked at the Qing army camp from afar, saw the Kangxi Emperor's flag flying, and the military appearance was neat, so he retreated overnight. The Kangxi Emperor ordered Feiyanggu to set up an ambush halfway, and according to the planned route, Geldan led his troops to run for five days and five nights to reach the ambush circle of Feiyangu. Feyangu sent a vanguard of 400 men to lure the enemy deeper and retreat while fighting, and Gordan's army did indeed reach the ambush circle. The Qing army was surprised and ambushed Geldan's army, and the two armies ended up fighting, and Gordan's army was killed and wounded, and Gordan escaped with only a few dozen cavalry.
Due to the fact that Gordan and the Qing army lost both battles, the group collapsed and infighting occurred. After a year, the Kangxi Emperor asked Geldan to surrender. And Gordan did not mean to surrender, or stubbornly resisted. As a result, the Kangxi Emperor once again led his troops through the Yellow River. At the time of Kangxi's third personal conquest, Geldan's original base area of Ili had been occupied by his nephew, and his left and right cronies heard of Kangxi's personal conquest and surrendered one after another, willing to be the guide of the Qing army. Gordan was desperate and eventually committed suicide by poisoning. Three conquests ended in the victory of the Qing Dynasty, and the Qing government regained control of Mongolia east of the Altai Mountains. However, from the perspective of the strength of the two sides, the Qing army was about 3 times more than Geldan, and Geldan's combat effectiveness was not weak, and it began to win and lose against each other. If it were not for Kangxi personally commanding the battle and boosting morale, the Qing army would certainly be defeated. It should be kangxi who knew that Geldan's strength was too strong, and he was about to reach Beijing, and because he was not confident about the Qing army, he personally went out on horseback. And three times of personal conquest, it is obvious that Kangxi really accompanied the life of his family. If it were not for the Kangxi Dynasty, history would not know how to rewrite it.