The orders were to take everything that they can, and burn and ruin everything that they can't take. The idea was to destroy infrastructure completely so as to weaken the southern population and the southern support for the war. They would burn farms and pillage everything leaving nothing standing.
Each of these events and actions dealt with the extension of slavery into the western territories. The Missouri Compromise (1820) banned slavery 36 degrees latitude. The Compromise of 1850 allowed for popular sovereignty (voters decide) in the Mexican Cession territory.
1. B, the treaty of paris
2. D, Charles Montesquieu
I hope this helped!