The fighter jets kept coming back and bombarding the mammoth, but it seemed that it didn't take any damage. The General decided to stop sending fighter jets to fight the mammoth since they didn't want to waste resources against an enemy that they couldn't kill. They still had to take care of the Insatiable Flies that occupied District 4, and it was more important than the mammoth since Asmond and his team were there.
The General said that he had prepared for a situation like that, and told them to wait. He said the weapon was still doing a final check and should arrive early in the morning which was 10 hours. He didn't mention what kind of weapon, but he believed it would work against an enemy like that.
Asmond was fine with that decision, and he couldn't agree more with the General's reasoning. They decided to take things slowly and observe the demon in front of them.