Final answer:
The United States started the U.S Christian Commission during the Civil War to help its soldiers.
Step-by-step explanation:
The religious organization that was started during the Civil War to help its soldiers was the U.S Christian Commission. The U.S Christian Commission was a volunteer organization that provided spiritual comfort, medical care, and supplies to Union soldiers. They also distributed Bibles and literature to the soldiers.
Learn more about U.S Christian Commission