Which battle resulted in many American soldiers deserting the army

Trenton

Bunker hill

Cowpens

Long Island

The answer is at the battle of long island.

The battle of Long island happened on August 27, 1776. It was the first major battle of the American Revolutionary War to take place after the United States declared its independence. After the battle, British casualties were around 400 men killed and wounded, while the Americans lost more than 2,000 men killed, wounded and captured.