Definition - What does War Powers mean?
War powers are the powers granted by the United States Constitution to the executive and legislative branches of the United States government regarding war.
Congress has the power to declare war, and the president has the power to be the commander and chief of the military forces of the nation.
Justipedia explains War Powers
The Constitution designed the war powers to be split up between the legislative and executive branches. The purpose of doing this was to balance the power between the two different branches of government to prevent one branch from having all the power. This way, a president would not be able to both declare war and control the military, and neither would Congress. However, there have been times in American history when the executive branch ordered military actions without the consent of Congress or without Congress declaring war.