The United States Civil War was fought between the Union and the Confederacy from 1861 to 1865. The primary causes of the war were slavery and states’ rights.
The Union had twice as many soldiers as the Confederacy (about 2 million vs. 1 million). There were also more men in the North who could be recruited into military service than there were in the South. This meant that if the war continued, it would only get harder for the Confederacy to win.
The economy of the South was based on agriculture, while most of its industry was located in cities along its coastlines. This meant that when those cities came under attack from Union forces, much of their industry was destroyed or dismantled so it couldn’t be used against them (such as burning ships so they couldn’t sail). This made it harder for the South to replace its supplies and equipment as well as feed its troops while fighting off an enemy with a larger army and more resources.
The South’s main strategy was to defend their territory and hope that the North would get tired of fighting and agree to a peace treaty or even give up some of their gains if they felt like they’d won enough battles already (which didn’t happen).
In addition, the North had greater industrial capacity than any other country at that time and was able to produce more weapons and supplies than their southern counterparts could ever hope to do on their own.