
The Insurrection Act of 1807 authorizes the president to deploy military forces inside the United States to suppress rebellion or domestic violence or enforce the law in certain situations. The Act has been invoked many times throughout American history, including during labor conflicts in the late 19th and early 20th centuries, and to enforce federally mandated desegregation. The Act does not provide for the declaration of martial law. The Insurrection Clause, also known as the Disqualification Clause, is found in Section 3 of the Fourteenth Amendment of the US Constitution. It stipulates that no person shall be a Senator, Representative, or hold any federal or state office if they have engaged in insurrection or rebellion against the United States.
| Characteristics | Values |
|---|---|
| Name | Insurrection Act of 1807 |
| What it does | Authorizes the president to deploy military forces inside the United States to suppress rebellion or domestic violence or to enforce the law in certain situations |
| What it replaced | The Calling Forth Act of 1792 |
| What it doesn't do | Authorize martial law |
| What it doesn't provide | A criminal penalty for insurrection |
| When it was modified | 1861, 1871 |
| Who can modify it | Congress |
| Where is it located | Sections 251 through 255 in Title 10 of the United States Code |
| What is it also known as | Insurrection Clause, Disqualification Clause |
| Where is it found | Section 3 of the Fourteenth Amendment |
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What You'll Learn

The Insurrection Act of 1807
The Insurrection Act has been modified twice, in 1861 and 1871. The 1861 modification allowed the federal government to use the National Guard and armed forces against the will of the state government in the case of "rebellion against the authority of the government of the United States." In 1871, the Third Enforcement Act revised the Act to protect Black Americans from attacks by the Ku Klux Klan and enforce the Equal Protection Clause of the Fourteenth Amendment.
The Insurrection Act has been invoked throughout American history, including during labor conflicts in the late 19th and early 20th centuries and to enforce federally mandated desegregation in the 20th century. More recently, it was invoked during the 1992 Los Angeles riots and in response to looting in the aftermath of Hurricane Hugo in 1989. In 2025, President Trump considered invoking the Insurrection Act to use the armed forces to suppress anti-deportation protests in Los Angeles, but ultimately decided against it.
The Insurrection Act has been criticized as being dangerously vague and in need of reform to clarify the circumstances under which it can be invoked and to restrict the President's power to deploy military forces domestically.
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The Act's chief clause
The Insurrection Act of 1807, often referred to as "the Insurrection Act", is the primary exception to the Posse Comitatus Act, which generally prohibits federal military forces from engaging in civilian law enforcement activities. The Insurrection Act, in its original 1807 wording, reads:
> "An Act authorizing the employment of the land and naval forces of the United States, in cases of insurrections. Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That in all cases of insurrection, or obstruction to the laws, either of the United States, or of any individual state or territory, where it is lawful for the President of the United States to call forth the militia for the purpose of suppressing such insurrection, or of causing the laws to be duly executed, it shall be lawful for him to employ, for the same purposes, such part of the land or naval force of the United States, as shall be judged necessary, having first observed all the pre-requisites of the law in that respect."
The Act has been modified twice: in 1861, a new section was added allowing the federal government to use the National Guard and armed forces against the will of the state government in the case of "rebellion against the authority of the United States"; and in 1871, the Third Enforcement Act revised the Act to protect Black Americans from attacks by the Ku Klux Klan.
The Insurrection Act authorizes the president to deploy military forces inside the United States to suppress rebellion or domestic violence or to enforce the law in certain situations. It is important to note that the Act does not authorize martial law, which generally refers to the military taking over the role of civilian government in an emergency. Instead, the Insurrection Act allows the military to assist civilian authorities without replacing them.
The Act has been invoked numerous times throughout American history, including during labour conflicts in the late 19th and early 20th centuries, and to enforce federally mandated desegregation in the 20th century. More recently, governors have requested and received support under the Act following looting in the aftermath of Hurricane Hugo in 1989 and during the 1992 Los Angeles riots.
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Invoking the Act
The Insurrection Act of 1807 is an amalgamation of different statutes enacted by Congress between 1792 and 1871. The Act allows the President of the United States to deploy troops on US soil for a variety of purposes, such as enforcing federal court orders, suppressing rebellions, and quelling civil unrest.
The Insurrection Act has been invoked numerous times throughout American history, often during periods of civil unrest, labour conflicts, and in response to rebellions against federal authority. For example, Presidents George Washington and John Adams invoked the Act in response to early rebellions against the federal government.
In the 20th century, the Act was used to enforce federally mandated desegregation. Presidents Dwight D. Eisenhower, John F. Kennedy, and Lyndon B. Johnson invoked the Act to enforce court-ordered desegregation, despite opposition from state political leaders.
More recently, in 1992, the Insurrection Act was invoked during the Los Angeles riots following the acquittal of four white police officers in the beating of Rodney King, a black man. President George Bush sent in active-duty members of the military and the National Guard to quell the unrest.
In 2020, during the George Floyd protests, President Donald Trump warned that he would invoke the Act to suppress the demonstrations. However, he ultimately did not do so, and instead invoked the Alien Enemies Act of 1798 to deport migrants.
The process of invoking the Insurrection Act typically involves the following steps:
- The President considers that unlawful obstructions, combinations, or assemblages, or rebellion against the authority of the United States, make it impracticable to enforce the laws through ordinary judicial proceedings.
- The President may then call into Federal service the militia of any State and use the armed forces as necessary to enforce the laws or suppress the rebellion.
- Troops can be deployed under three sections of the Insurrection Act (Sections 251, 252, and 253), each designed for a different set of situations.
- Section 251 requires state consent for the deployment of troops, while Sections 252 and 253 allow the President to deploy troops without the request or consent of the affected state.
- The Posse Comitatus Act, which forbids the US military from taking part in civilian law enforcement, is temporarily suspended when the Insurrection Act is invoked.
- The deployed troops are not authorised to declare martial law or take over the role of civilian government. Instead, they assist civilian authorities in enforcing the law.
- The Supreme Court has clarified that it may review the lawfulness of the military's actions, even if the decision to deploy troops is not second-guessed.
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The Posse Comitatus Act
The title of the Act derives from the legal concept of posse comitatus, which refers to the authority of a county sheriff or law officer to conscript any able-bodied person to assist in maintaining peace. In the context of the Posse Comitatus Act, it specifically prohibits the use of soldiers instead of civilians as a posse comitatus. The Act initially applied only to the United States Army, but amendments over the years have expanded its scope to include the Air Force, Navy, Marine Corps, and Space Force. The Coast Guard, despite being a military branch, is not bound by the Posse Comitatus Act as it has explicit statutory authority to conduct law enforcement.
While the Posse Comitatus Act generally restricts the use of military personnel in civilian law enforcement, there are statutory exceptions. The most notable exception is the Insurrection Act, which allows the president to deploy the military to suppress an insurrection or rebellion against federal authority in a state, enforce federal civil rights laws, or protect a group's civil rights when the state government fails to do so. The Insurrection Act has been invoked numerous times in American history, including during labour conflicts, to enforce desegregation, and in response to natural disasters.
It is important to note that the Posse Comitatus Act does not apply to the National Guard when under state authority. In such cases, the National Guard may act in a law enforcement capacity within its home state or an adjacent state if invited by the governor of that state. However, when National Guard personnel are federalized, they become subject to the Posse Comitatus Act until they are returned to state control.
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The Insurrection Clause (Disqualification Clause)
The Insurrection Clause, also known as the Disqualification Clause, is part of Section 3 of the Fourteenth Amendment to the US Constitution. This clause stipulates that any person who has sworn to uphold the Constitution as a member of Congress, an officer of the United States, a member of a state legislature, or a state executive or judicial officer, and who subsequently engages in insurrection or rebellion against the Constitution or provides aid to its enemies, is disqualified from holding specific offices. These offices include Senator, Representative, elector of the President or Vice-President, or any federal or state military or civil office.
The Insurrection Clause was ratified in the aftermath of the Civil War, and it has rarely been applied. The Enforcement Act of 1870 provided for federal enforcement of the clause, but the passage of the Amnesty Act of 1872 halted its enforcement against those who participated in the Civil War on the side of the Confederate States of America. In 1872, Congress removed the disqualification from all persons except Senators, Representatives, and certain other officials. In 1898, broader legislation was enacted to remove the remaining Section 3 disabilities incurred during the Civil War.
The Insurrection Clause has been invoked in modern times, most notably in the case of Trump v. Anderson. In this case, the Supreme Court reversed a decision by the Colorado Supreme Court, which had held former President Donald Trump ineligible for the office of President under Section 3 due to his alleged engagement in insurrection. The Supreme Court's ruling, however, did not address the merits of whether Trump had engaged in insurrection, but rather, it focused on procedural issues related to the case.
It is worth noting that there is also an Insurrection Act of 1807, which authorises the employment of the land and naval forces of the United States in cases of insurrections or obstruction to the laws. This act has been invoked numerous times throughout history, including during labour conflicts, to enforce desegregation, and in response to civil disturbances, such as looting and riots.
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Frequently asked questions
The Insurrection Act of 1807 authorizes the president to deploy military forces inside the United States to suppress rebellion or domestic violence or to enforce the law in certain situations.
The Act allows either for the federalization of state militias or the use of the regular armed forces in the case of rebellion against a state government. It does not, however, authorize martial law.
The Insurrection Act has been invoked many times throughout American history. In the late 19th and early 20th centuries, it was invoked during labor conflicts. Later, Presidents Eisenhower and Kennedy invoked it to enforce desegregation. More recently, governors have requested and received support following looting in the aftermath of Hurricane Hugo in 1989 and during the 1992 Los Angeles riots.
The Insurrection Clause, sometimes referred to as the Disqualification Clause, is part of Section 3 of the Fourteenth Amendment. It disqualifies any person who has engaged in insurrection or rebellion from holding federal or state military or civil office.
























