North had a much larger population, 22 million to be exact. 90% of the country’s manufacturing and industry, and most of the nations gold and money. Meanwhile the South had great leaders/leadership and were fighting a
The North had poor leaders/leadership, while the South had an economy that couldn’t support the war, few factories, and poor railroad systems
They were vital because Missouri could control parts of the Mississippi River and routes to the West. Kentucky could control part of the Ohio River. Maryland was close to the Confederate capital of Richmond. And Delaware was close to the key Union city of Philadelphia.
Both the union and the Confederacy used African-American soldiers during the Civil War.