Why can't the million-strong army of the former Qin Dynasty beat the hundred thousand-strong army of the Eastern Jin Dynasty?

After Fu Jian unified the north, it wanted to further unify the world and conquer the Eastern Jin Dynasty, which was just south of the Yangtze River. In July 383, Fu Jian decided to send 900,000 troops to crusade against the Eastern Jin Dynasty. His favorite concubine, Mrs. Zhang, Prince Fu Hong, brother Fu Rong, and his ministers all strongly opposed it, but Fu Jian was adamant and refused to listen to anyone. In order to make up this nearly one million troops, Fu Jian invested all the manpower in the country. He ordered the people to have one in every ten people, and named all strong and brave children under the age of 20 Yu. Fu Jian thought it was a battle to win, and he didn't even verify the enemy's situation, so he was eager to go out in person.

In fact, being rich and strong has made great efforts in national strength, which has aroused public resentment. Although there were many foot soldiers in the former Qin dynasty, their hearts were uneven. Among them, clans, constitutional clans and other soldiers of all ethnic groups live together and have many contradictions. The former Qin army was huge, but the front was very long. Then the army has confronted the Eastern Jin Dynasty, which is still in Guanzhong. In the Eastern Jin Dynasty, Emperor Xiao Wu was incompetent, but he was assisted by a competent prime minister, Xie An. People in the Eastern Jin Dynasty did not want to die, but they also put aside internal contradictions and shared common interests. Before the rally in Qin Jun, the Japanese took the initiative to fight a decisive battle at Feishui. Fu Jian was eager to win and took it lightly. As a result, the Battle of Feishui was defeated, and Fu Rong, commander-in-chief of the striker and brother of Fu Jian, died and retreated to the front. The soldiers in the rear thought that their troops were in rout and retreated hastily, and the more they retreated, the more they panicked. As a result, they are nervous and nervous. Before Qin Jun committed suicide, countless people died. Nearly 654.38+0000 Qin Jun was killed by the Eastern Jin army with less than 654.38+00000 troops. And Fu Jian also fell prey to the flow vector, and fled back to Guanzhong with less than 65,438+10,000 down archers.