Gu Yun and Shen Yi looked at each other. As the commander of the four sides, he was aware of everything inside, but for the sake of insurance, he asked in detail about various situations in the Eighteen Tribes.

"That's right," Cai Fen said. "This year, the North has suffered a severe wind disaster. Many cattle and sheep have died. There is not enough meat. The meager amount planted and raised in the local area is not enough to eat, let alone support the war. After Marshal defeated the Western Regions, you had basically cut off the supply and transportation routes of the barbarians. I heard that the Westerners in Jiangnan are not doing well themselves either, even if the routes were not cut, they don't necessarily have the power to take care of the barbarians."

Shen Yi said, "I learned from another line that the Second Prince who usurped the throne did not seem to have done so intentionally, but that there was something wrong within their Eighteen Tribe Alliances."

Cai Fen thought about it and nodded, "General Shen's statement is reasonable. In fact, just before winter this year, some barbarians had secretly dug Ziliujin to trade for food. Looking at the quantity, it was not necessarily done by regular civilians. At that time, I felt that the Eighteen Tribes might be dispersed. As expected, after a short time, the Second Prince imprisoned his father and brother."

Shen Yi looked at Gu Yun, who nodded slightly to him.

Cai Fen sensed something unusual and asked, "Marshal, what's the matter?"

Shen Yi gave a brief summary of what happened and the arrest of the envoy in the capital.

Cai Fen was horrified, then shook his head in a solemn manner after a moment: "Marshal, General Shen, even if there were internal disagreements among the Eighteen Tribes, whether Jia Lai Ying Huo wanted to bring outsiders to calm the insiders, or simply wanted to burn everything altogether, why bother sending people into the capital city? Just coming to the Northern frontier station to set off a fire, that would be more effective. Does he have no one else to deploy except for a single guard?"

Shen Yi shook his head. "That's convenient, but the people currently in power in the Heavenly Wolf Tribe are likely to push one or two people out as a scapegoat, it would not solve anything."