Who fought mainly a defensive war during the civil war?

During the American Civil War, the Confederacy primarily fought a defensive war. Their strategy focused on protecting their territory and resources while attempting to outlast the Union's will to fight. Confederate generals, such as Robert E. Lee, often sought to leverage their knowledge of the terrain and the support of local populations to repel Union advances. This defensive posture was aimed at preserving their way of life and securing independence for the Southern states.