Answer:
19. South.
20. South
Step-by-step explanation:
The South´s Confederates were against the states' rights philosophy because it meant that the Northern states had the right not to support slavery. That´s why the South states seceded.
At the same time, the Confederacy´s strategy during the Civil War was to develop a strong defense to outlive the North´s capacity to endure the war by showing that it was going to be a long and expensive fight.