
The United States Constitution gives Congress the power to raise and support armies, declare war, and fund military operations. This allocation of power acts as a check on the President's authority as Commander-in-Chief of the military, ensuring that the President does not have excessive control over the military. The Framers of the Constitution, drawing on their experience during the American Revolution, intended to separate powers and provide a system of checks and balances. The Constitution also addresses concerns about standing armies and the potential threat they pose to liberty, limiting funding for this purpose to a period of two years. The Posse Comitatus Act further safeguards against the military interfering in civilian government by prohibiting the use of the Army, Navy, Marine Corps, Air Force, and Space Force for civilian law enforcement without express authorization.
| Characteristics | Values |
|---|---|
| Commander-in-chief powers | Vested in a single person, the President |
| Power to declare war | Congress |
| Power to raise and support armies | Congress |
| Power to fund armies | Congress |
| Power to conscript | Congress |
| Power to govern and regulate the army | Congress |
| Power to call on militias | Congress |
| Number of active-duty personnel in 2018 | 450,000 |
| Posse Comitatus Act | Military personnel may not participate in civilian law enforcement unless expressly authorized by statute or the Constitution |
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What You'll Learn
- The US Constitution gives Congress the power to declare war and raise and support armies
- Congress has a duty to fund armies, which acts as a check on the president's power
- The president is the commander-in-chief of the military and the federal militia
- The Supreme Court has upheld the constitutionality of conscription and compulsory military service
- The Constitutional Convention of 1787 provided checks on standing armies by allowing the president to command and Congress to finance it

The US Constitution gives Congress the power to declare war and raise and support armies
The Framers were wary of vesting too much power in a single branch of government, having seen the dangers of absolute power during their experience with the English monarchy. By vesting Congress with the power to declare war and raise and fund armies, the Framers intended to create a system of separation of powers and checks and balances.
The specific clause granting Congress the power to raise and support armies is known as the Army Clause, or Clause 12 of Article I, Section 8. It states that "The Congress shall have Power To... raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years." This limitation was included to address fears about the dangers of standing armies to liberty, as seen in historical examples such as Julius Caesar's army in ancient Rome.
The power to raise and support armies also includes the ability to create its own armies and navy for unlimited purposes and to fund and regulate state militias. Congress has the authority to mobilize an army and this power is distinct from its authority to call upon militias. The Supreme Court has upheld the constitutionality of conscription and compulsory military service, ruling that it does not violate the Thirteenth Amendment's prohibition against involuntary servitude.
Throughout history, there have been conflicts between the legislative and executive branches regarding their respective powers over military affairs. While the president has the power to authorize military action, Congress has the power to provide authorization and funding for such actions, acting as a check on the president's commander-in-chief powers.
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Congress has a duty to fund armies, which acts as a check on the president's power
The US Constitution gives Congress the power to raise and support armies, as well as the responsibility to fund them. This is outlined in Article I, Section 8, Clause 12, also known as the Army Clause, which states that "The Congress shall have Power...to raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years."
The Framers of the Constitution intended to separate powers and provide checks and balances on the president's power to wage war. They were cautious of granting the president, as commander-in-chief, excessive control over the military, having learned from their experience with the English monarchy that power could corrupt. Thus, they vested Congress with the power to declare war, fund armies, and make rules concerning captures on land and water.
The power to fund armies is an essential check on the president's commander-in-chief powers. Congress's ability to control funding for the military acts as a limit on the president's ability to wage war and use military force. This was further reinforced by the limitation that no appropriation of money for the army shall be for longer than two years, addressing fears about the dangers of standing armies to liberty.
Throughout history, there have been conflicts between the legislative and executive branches regarding their respective powers. The Constitutional Convention of 1787 in Philadelphia provided checks on any standing army by allowing the President to command it but giving Congress the power to finance it through short-term legislation. This interplay between Congress's war powers and the president's war powers continues to evolve, with Congress authorizing or providing different types of authorization for the president's military actions.
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The president is the commander-in-chief of the military and the federal militia
The U.S. Constitution gives Congress the power to raise and fund armies, declare war, and make rules concerning their governance. However, the President of the United States is designated as the Commander-in-Chief of the military and the federal militia, also known as the National Guard. This role gives the President the authority to conduct military operations and make strategic decisions during wartime. The Commander-in-Chief Clause of Article II, Section 2 states that:
> "The President shall be Commander in Chief of the Army and Navy of the United States, and of the Militia of the several States, when called into the actual Service of the United States."
The Framers of the Constitution, influenced by their experience during the American Revolution, chose to vest the commander-in-chief powers in a single person, allowing for quicker decision-making during wartime. However, they were cautious of granting too much power to a single branch of government, so they gave Congress control over funding and declaring war to act as a check on the President's power.
While the President has the authority to deploy the National Guard in domestic emergencies, this power is not absolute. The Posse Comitatus Act prohibits members of the military from participating in civilian law enforcement unless expressly authorized by statute or the Constitution. The Act ensures that the military cannot interfere in civilian government affairs, upholding the core American value of civilian control over the military.
The President's role as Commander-in-Chief has been a source of controversy, with disputes arising over the scope of their unilateral authority. These debates centre around the interpretation of the Commander-in-Chief Clause and the balance of power between the President and Congress in matters of national defence and emergency powers.
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The Supreme Court has upheld the constitutionality of conscription and compulsory military service
The U.S. Constitution grants Congress the power to raise and support armies, declare war, and fund military operations. This is outlined in Article I, Section 8, Clause 12, also known as the Army Clause, which states that "no Appropriation of Money to that Use shall be for a longer Term than two Years." This clause was included to provide checks and balances on the president's power as commander-in-chief, ensuring that the president could not maintain a standing army without congressional approval.
The constitutionality of conscription, or the draft, has been a subject of legal scrutiny, particularly during significant conflicts. The Supreme Court has historically upheld the constitutionality of conscription and compulsory military service, beginning with *Arver et al. v. United States* in 1918, which affirmed Congress's power to compel military service under the Draft Act of 1917. The Court held that Congress's power to "raise and support armies" included the authority to enforce conscription.
In subsequent cases, the Supreme Court has continued to uphold the constitutionality of conscription while addressing various legal challenges. For example, in *Gillette v. United States* (1971), the Court considered the arguments of petitioners who claimed that the Selective Service Act of 1967 violated the First Amendment's religion clauses. The Court upheld the constitutionality of the act's exemption clause, which allowed for exemptions based on religious beliefs.
Another notable case is *Rostker v. Goldberg* (1981), which addressed gender discrimination in conscription policies. The Court upheld the exclusion of women from the draft, reflecting the military's combat role policies at the time. The Supreme Court has also rejected arguments that conscription constitutes involuntary servitude, analogizing it to civic duties such as jury duty.
The Supreme Court's rulings on conscription and compulsory military service have evolved over time, particularly in considering the religious and conscientious objections of draftees. While the Court has maintained a distinction between general opposition to war and legitimate religious objections, it has given more considered treatment to conscientious objectors, especially during the Vietnam War.
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The Constitutional Convention of 1787 provided checks on standing armies by allowing the president to command and Congress to finance it
The Constitutional Convention of 1787 in Philadelphia was a significant event in American history, resulting in the creation of the first written constitution for any nation. The convention addressed concerns about the need for a standing army outside of wartime and aimed to provide checks and balances on its power.
The convention delegates, including James Madison, recognised the importance of vesting commander-in-chief powers in a single person, allowing for swift decision-making during wartime. However, they were cautious about granting the president excessive control over the military. As a result, they provided checks on standing armies by allowing the president to command while granting Congress the power to finance and raise armies.
This separation of powers was intentional, aiming to prevent the concentration of military authority in a single branch of government. The framers of the Constitution drew on their experiences during the American Revolution, witnessing General George Washington's effective leadership of the Continental Army. They understood the need for decisive leadership in times of war, but they were also aware of the potential for power to corrupt, as seen in their experiences with the English monarchy.
Article I, Section 8, Clause 12 of the Constitution, known as the Army Clause, outlines this distribution of powers. It states: "The Congress shall have Power To... raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years." This clause ensures that Congress has the authority to finance the military through short-term legislation, providing a check on the president's power to wage war.
The Constitutional Convention's efforts to balance power between the president and Congress regarding the military have had a lasting impact on American governance. While conflicts between the legislative and executive branches over war powers have occurred throughout history, the checks and balances established in 1787 continue to shape the interplay of these powers.
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Frequently asked questions
Article I, Section 8 of the US Constitution gives Congress the power to raise and support an army.
The Framers of the Constitution gave these powers to Congress to ensure that the legislature had several checks on the president's ability to wage war as commander-in-chief of the military.
The President has the power to command the army and call up state militias under certain circumstances. The Posse Comitatus Act also states that members of the military may not participate in civilian law enforcement unless expressly authorized by a statute or the Constitution.
The Constitution states that "no appropriation of money to that use shall be for a longer term than two years," limiting the amount of funding that can be allocated to the army. There are also concerns about the need for a standing army outside of times of war, with some arguing that standing armies in times of peace are dangerous to liberty.



















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