What war are we talking about? Different wars were fought and opposed for different reasons. Some generic reasons include the person not supporting the country's motives for the war, believing their county was not in the right, or a whole slew of reasons individual to each war.<span />
Government get its power from citizens voting.
The United States Civil War was the bloodiest war in American history.
France blamed germane for WW1
The three powers are : The power to raise armies,to declare war, and write bills to be approved by the president. I find these three most important out of all because these affect our economy and country more then the rest (Not saying the rest aren't important just don't think there as important as the three i listed above)