On October 19th, the first year of Wen Jian (1399), the Yanjun was reorganized in Huizhou (now Pingquan County, Hebei Province) and divided into five armies: the middle, the front, the left, the right and the back. 1October 2 1 day, Yan Jun entered Songting Pass (now southwest of Kuancheng County, Hebei Province). 1 1 On the fifth day of the month, Yanjun crossed the Baihe River (it was frozen at that time and crossed the river east of Shunyi District), defeating more than 10,000 sentry Chen Huijun in Li Jinglong. On the same day, he fought with Li Jinglong's troops in Zhengcunba.
Yan Jun hit everywhere, even broke the seventh battalion of the Confederate army, and Li Jinglong was defeated. That night, Li Jinglong saw that the war was unfavorable, and all the troops in Zhengcunba retreated lightly. The trench of hundreds of thousands of people was left to the Yan army. However, Li Jinglong left in a hurry and didn't inform the Confederate army that besieged Peiping, so the Yanjun easily defeated the Confederate army at the gates of Peiping and obtained its materials. Li Jinglong led his troops back to Texas, and the battle of Zhengcunba ended. In this battle, the confederate army lost 10 more than ten thousand people.
General Li Jinglong attacked Beiping (now Beijing) and retreated Zhengcun Dam. On the fourth day, Judy, the prince of Yan, returned to Gushan from Daning (now Ningcheng, Inner Mongolia) (now four miles east of Tongxian County, Beijing) and learned that her army was arrayed in the west of Baihe River (that is, the North Canal), so she took the river to freeze and marched westward, defeating more than 10,000 people led by Chen Hui, commander-in-chief of the Li Jinglong Army outpost.
On the fifth day, at Zhengcunba, he fought with Li Jing Long Jun. When Judy saw that his troops were moving, he attacked the 7th Battalion with Jones. Yan led Zhang Yu and others to form a line and arrived at the gate. The troops who stayed in the city went out of the city to participate in the war, and were attacked from inside and outside, defeating the army of Jianwen Emperor. Li Jinglong fled south to Texas. The next day, Yanshi continued to attack and breached the fourth base. When all the troops heard that Li Jinglong had fled, they abandoned their soldiers' food and fled south day and night. In this battle, Yan Shi * * * killed tens of thousands of his troops and won more than twenty thousand horses.
On November 9th, the first year of Wen Jian (1399), Judy returned to Beiping City. As there was no reply to the previous (July) letter, he wrote to the court again, stating that Mrs. Ji and Huang Zicheng were guilty of suzerain. He didn't respond. 1February, Judy demoted Wu Gao, commander-in-chief of Liaodong, by using double spies, thus eliminating the worries in Northeast China.
As Li Jinglong planned to wait until next year (1400) before attacking Yan in the north, he decided to attack Datong in Shanxi to contain the Confederate army. 1February 19, Judy set out to attack Datong. 1On February 24th, Yan Jun arrived in Guangchang, and the garrison commander Yang Zong surrendered. In the second year of Wen Jian (1400), on the first day of the first month, Yan Jun arrived in Yuzhou, and Zhong Wang and Tang gaozu, commanders of the Ming army, surrendered. On the second day of February, the Yanjun attacked Datong.
Because Datong was the fief of the king, and its military position was extremely important, Li Jinglong had to rescue him. After Li Jinglong walked out of Zijingguan, the Yanjun returned to Peiping from Juyongguan. Confederate troops made a vain trip in the ice and snow, and suffered great losses in equipment and morale.
In the second year of Jian 'an (1400), on February 28th, Li Jinglong wrote to Judy, requesting a temporary truce. Prince wrote back to ask Qi Tai, Huang Zicheng, etc. Li Jinglong had second thoughts from then on. Besides letting the Confederate army run for a month in vain, Yan Jun unexpectedly met an army from Mongolia at the same time and incorporated it. In addition, in February of Wen Jian's second year (1400), Yan fell in Baoding.