Strategically - it was for the North to do the invading.
Manpower wise - some of the best officers of the US Army had resigned to join them, and the Southern rank-and-file were the kind of men already experienced in the soldierly skills like riding and shooting.
The North had a big enough navy to blockade the Southern ports and starve the Confederacy of imports.
the union gained a huge advantage over the confederacy because of the union's balloon corp.
About 250,000 Confederates fought in the Civil War
Union
The Confederacy
The bombardment of Fort Sumter by the Confederates led to the outbreak of the Civil War.
The North had a big enough navy to blockade the Southern ports and starve the Confederacy of imports.
France and Spain
Most of the battle was fought in the south. And they knew their land.
Kentucky was allowed to stay neutral at the beginning - Lincoln was worried about driving it into the arms of the Confederacy.
The US had been split into the Union (North) and the Confederacy (South)
At the beginning of the Civil War, the Union had 19 states, not including the four border states that did not secede. The Confederacy had only 11.
The South.
North Carolina was a slave state at the beginning of the Civil War and became a part of the Confederacy.
Confederacy
The Confederacy as a nation did not exist in 1860.
the union gained a huge advantage over the confederacy because of the union's balloon corp.