Soon after Zhang Huan's envoy left, the leaders of the various Southern Xiongnu tribes, along with their respective soldiers, arrived at the royal court.

In recent years, they have been locked in a life-or-death struggle with the Left Wise King's tribe. Now, not only is there profit to be made, but they can also obtain a large amount of supplies. Therefore, despite the extremely cold weather, the various tribes of the Southern Xiongnu have still gathered 30,000 cavalry.

December 10th.

Under Yufuluo's leadership, the Southern Xiongnu soldiers split into five routes and began to burn, kill, and plunder along the Great Wall towards the tribe of the Left Wise King. Not only the Left Wise King's tribe, but also some nearby Xianbei tribes were not spared.

The soldiers of the Southern Xiongnu swept through the land like locusts, wiping out all tribes that did not belong to them. No one was spared, whether old or young; they were all captured by the Southern Xiongnu.

Upon receiving the news, Xie Zhiyu was furious. He wanted to gather his troops to retaliate, but he was worried that Tan Shihuai would cause trouble behind his back. So he sent someone to negotiate with Tan Shihuai, hoping that Tan Shihuai would hold back.

Unexpectedly, Tan Shihuai not only readily agreed to Xie Zhiyu's request, but also proposed to jointly send troops to attack the various tribes of the Southern Xiongnu, to which Xie Zhiyu immediately agreed.

Subsequently, Tan Shihuai and Xie Zhiyu began to gather the tribe's warriors to prepare to attack the Southern Xiongnu.

In the past two years, the power of the Tanshihuai tribe has grown stronger and stronger. It has annexed most of the Xianbei in the central region and formed an alliance with the Yuwen tribe in the central region and the Murong tribe in the east.

In Tan Shihuai's view, the Xianbei and the Han Dynasty would inevitably clash sooner or later, and the Southern Xiongnu would become a barrier between the Xianbei and the Han Dynasty, which had to be eliminated.