"I can agree to this," Jirgalang said after careful consideration, "but Wu Sangui must be the first to betray He Jin. After my people win the battle, I will arrange 2,000 Mongolian soldiers for you."

"As for whether you can keep them, it depends on your own ability."

"no problem."

The two sides reached a deal.

On the fourth day of April, Wu Sangui's troops arrived near the second tributary of the Xisha River.

At this time, there were tributaries of the Xisha River in front, behind and on the right side of him.

On the left is Yiwulü Mountain.

This narrow strip of land was not suitable for staying for a long time, so after observing the terrain, he began to order people to build a pontoon bridge in preparation for crossing the river.

While preparing to cross the river, he sent a large number of scouts to the right wing.

These scouts are all his confidants.

On the surface, it was to scout the strength of the Jiannu troops on the right wing, but in fact it was to observe the deployment of He Jin on the right wing.

By noon, the scouts had a clear understanding of He Jin's deployment of troops.

Including but not limited to formation, position of each type of soldiers, weak points, etc.

He Jin was completely unaware of this.

It's not that he's not careful, it's just normal.

Whenever there is a war, both sides will send out a large number of scouts.

As the vanguard, Wu Sangui should have conducted reconnaissance on the right wing.

As for why Wu Sangui's scouts appeared behind him, it is not difficult to understand.

When enemy and our scouts meet, they will chase and fight each other. It is very common on the battlefield for them to escape behind friendly forces to avoid the enemy's pursuit.

Wu Sangui ordered his confidants to tie the information to the arrows, and then waved his hand: "Cross the river!"