The president is known as the commander-in-chief. What does this mean?

The president has the power to declare war
The president has the power to determine the military budget
The president has the power to give orders to all uniformed military officers
The president has the power to grant letter of reprisal

As the commander-in-chief, the president of the United States is the highest-ranking officer in the military and is responsible for the overall strategy and direction of the armed forces. This includes the power to give orders to all uniformed military officers, but does not necessarily mean that the president has the power to declare war unilaterally. The power to declare war rests with the Congress, although the president may order military action in certain circumstances without a formal declaration of war. Additionally, the president has the power to determine the military budget and may grant letters of reprisal in certain situations.