What were the advantages the North had over the South during the Civil War

The North had a larger population than the South.

The Union also had an industrial economy, where as the Confederacy had an economy based on agriculture.

The Union had most of the natural resources, like coal, iron, and gold, and also a well-developed rail system.

cherokee and arikara

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.