Gu Yun's oral message to the Black Eagle was ferocious and left no room for survival, but what was written inside was very logical: "The Barbarians risked their lives in this battle, just like beasts in distress, not to mention the Eighteen Tribes' previous internal fight, it will be difficult to go on for a long time. The first three or five days are the most difficult to endure. Once the front line is defended, you only need to hold them back for a few days. The Barbarians will be prosperous at first, then will weaken, and be exhausted afterwards. At this time, the armistice will continue to sow discord. In the future, the Northern Frontier's situation may be settled once and for all, proceed with caution, but there is no need to fear. Although I am not able to come, I exist alongside with the Black Iron Camp's three armies."

Shen Yi's eyes momentarily felt his eyes become hot: "Command all units, defend at all cost and hold them back!"

And Gu Yun, who boasted that he was with the Black Iron Camp, did not write this letter easily. He managed to steady his hand until he finished sealing, at that point, battle reports had piled up.

Not knowing whether Chang Geng wanted him to feel reassured or what, he specially assigned a team of Light Cavalry to go back and forth between the battlefield and the camp, presenting the battle report immediately. Gu Yun seldom had a battle in which he did not need to be present his whole life, it was quite a fresh feeling. There was no redundant information in the Marshal's tent to disturb his thinking, nor was there a need to evade sharp arrows, or to be affected by the fierce emotions in the battlefield. He looked at the war situation from the perspective of a bystander.

At the beginning of the war, the test was whether the basic patrol of Jiangbei Camp was strict and whether the Navy was alert enough. General Zhong and Gu Yun laid a solid foundation, they could easily bear the heavy bombardment of the Western Army.

However, when all the above had been destroyed and the strength of the two armies were similar, the rest depended on the commander's experience and talent.

Gu Yun really broke out in a sweat — as the Black Eagle read the war report to him, he knew that the commander of the other side was a strategic expert and a true master of naval battle. Even if he went to the battle himself, he would still have to act carefully.

The Black Eagle rushed in and reported the latest development: "There is a single enemy fleet in the southwest. His Highness Yan Wang adjusted the forward path and intends to stab them there."