In the red badge of courage, why is henry described as a "war devil"?

Answer: Because he is descripted as a furious soldier that must kill o be killed.

Explanation:

Hi, in the red badge of courage, Henry is described as a war devil, because he has been described as a furious soldier that must kill or be killed and has no respect or sympathy for his enemies.

He shots with his rifle until it becomes hot, and keeps shooting even when the enemy has already withdrawn.

He is also called a fighting machine by his comrades.

Henry is described as a "war devil" in the Red Badge of Courage because he loads and shoots and reloads and shoots and shoots until his rifle is so hot. He runs towards the enemy without any regard for his life, so that's why he is described as a madman, a "war-devil".