Moreover, the most crucial point was that Yan Fei had already completed all his tasks for this trip to the African continent. Although he wanted to vent his fury and eliminate the US forces' military presence in Africa entirely, he could withdraw at any time when he realized that victory was impossible, without the need to go all out against the US forces.
Therefore, for Yan Fei at that moment, he was already in an invincible position. The only reason he stayed behind to combat the US forces was because he was angered by being outmaneuvered by them, which had resulted in casualties among the Dream Island citizens, and he wanted to teach the US forces a lesson. At the same time, it was to earn more merit points, aiming for another upgrade of the Drone.