The Union.
Before the Civil War Montgomery Alabama was considered the capital of the south. When Virginia entered the confederacy during the Civil War, the capital of the South was moved to Richmond Virginia.
The advantages that the Confederates had in the Civil War were (1) the Confederate troops had the motivation of defending their homes and families, (2) the Confederates had prepared for war by accumulating a small store of supplies, and (3) the Confederates had better military leaders.
The north had more advantages, the south had more allies.
The union capital stayed in Washington, DC.
Midwest began to specialize in manufacturing cotton
Smaller population. No industrial manufacturing.
The Union, by a wide margin: gearing up to use the great advantages of population and manufacturing might took longer than Union leaders expected.
Much bigger population and much bigger manufacturing capacity.
Bigger population. Better artillery. More talented President.
They had a larger population, a larger manufacturing capacity, more modern weapons, and claimed a higher moral ground.
Bigger population from which to recruit armies. Better industrial manufacturing capability. More talented President.
The North had a superiority in number of states, and population, as well as manufacturing capability.
The North's advantage in its large population allowed for the recruitment of more soldiers. In terms of personal property, this was not a factor during the US Civil War.
The South was very weak in capital resources. It's prime method of building capital was selling its cotton. This was difficult as it had no real navy to protect its cargo ships carrying cotton.
Much bigger population from which to recruit armies, and nearly all the industrial manufacturing capacity in America.
They had to. The South had declared themselves to be a separate nation, and would have been happy without a war. It was up to the Union to invade and destroy the Confederacy. This was one of the disadvantages of the Union, offsetting their big advantages in the form of larger population and better manufacturing capacity.
They had fewer troops, lower population They had little in the way of manufacturing - this made it difficult to arm and provision troops.