How did executive powers increase during the civil war?

He also declared martial law, authorized the trial of civilians by military courts, and proclaimed the emancipation of slaves--all on the grounds that "I may in an emergency do things on military grounds which cannot be done constitutionally by Congress." In so doing, Lincoln vastly expanded presidential war powers

Explanation:

the noble might have thought that the system was far because they had lot of things and riches and the serf would have thought that the feudal system was un fair because of the way they were treated.