In the United States, there are both federal and state laws prohibiting treason. Treason is defined on the federal level in Article III, Section 3 of the United States Constitution as "only in levying War against [the United States], or in adhering to their Enemies, giving them Aid and Comfort." Most state constitutions include similar definitions of treason, specifically limited to levying war against the state, "adhering to the enemies" of the state, or aiding the enemies of the state, and requiring two witnesses or a confession in open court. Fewer than 30 people have ever been charged with treason under these laws.

In the United States, Benedict Arnold's name is considered synonymous with treason due to his collaboration with the British during the American Revolutionary War. Arnold became a general in the British Army, which protected him. John Bly and Charles Rose were convicted of treason and hanged for their participation in Shays' Rebellion. These cases occurred before the adoption of the United States Constitution in 1789. Since the Constitution came into effect, there have been fewer than 40 federal prosecutions for treason and even fewer convictions. A handful of other people convicted of the offense at the federal level have been pardoned. The first example was such as militants John Mitchell and Philip Weigel from the Whiskey Rebellion, were both pardoned by President George Washington.

Death sentences for treason under the Constitution have been carried out 16 times. The United States executed 15 Taos Revolt insurgents led by Pablo Montoya and Tomás Romero in 1847. The United States executed William Bruce Mumford in 1862 during the Civil War.

Federal history Shays' Rebellion

Shays's Rebellion was an armed uprising in Western Massachusetts and Worcester in response to a debt crisis among the citizenry and in opposition to the state government's increased efforts to collect taxes on both individuals and their trades. The fighting took place in the areas around Springfield during 1786 and 1787. Historically, scholars have argued that the four thousand rebels, called Shaysites, who protested against economic and civil rights injustices by the Massachusetts Government were led by Revolutionary War veteran Daniel Shays. By the early 2020s, scholarship has suggested that Shays's role in the protests was significantly and strategically exaggerated by Massachusetts elites, who had a political interest in shifting blame for bad economic conditions away from themselves.

In 1787, the protesters marched on the federal Springfield Armory in an unsuccessful attempt to seize its weaponry and overthrow the government. The federal government, severely limited in its prerogatives under the Articles of Confederation, found itself unable to finance troops to put down the rebellion; it was consequently put down by the Massachusetts State Militia under William Shepard, alongside a privately funded local militia led by former Continental Army officer Benjamin Lincoln. The widely-held view had already developed that the Articles of Confederation were untenable and needed amending, with the events of the rebellion serving as further evidence for the later Constitutional Convention. There is continuing debate among scholars as to what extent the rebellion influenced the later drafting and ratification of the Constitution.

Four thousand people signed confessions acknowledging participation in the events of the rebellion in exchange for amnesty. Several hundred participants were eventually indicted on charges relating to the rebellion, but most of these were pardoned under a general amnesty that excluded only a few ringleaders. Eighteen men were convicted and sentenced to death, but most of these had their sentences commuted or overturned on appeal or were pardoned. John Bly and Charles Rose were hanged on December 6, 1787.Richards, pp. 38–41 They were also accused of a common-law crime for looting.

Shays was pardoned in 1788 and he returned to Massachusetts from hiding in the Vermont woods. He was vilified by the Boston press, who painted him as an archetypal anarchist opposed to the government.Richards, p. 117 He later moved to the Conesus, New York area, where he died poor and obscure in 1825.Zinn, p. 95

The crushing of the rebellion and the harsh terms of reconciliation imposed by the Disqualification Act all worked against Governor Bowdoin politically. He received few votes from the rural parts of the state and was trounced by John Hancock in the gubernatorial election of 1787.Richards, pp. 38–39 The military victory was tempered by tax changes in subsequent years. The legislature cut taxes and placed a moratorium on debts and also refocused state spending away from interest payments, resulting in a 30-percent decline in the value of Massachusetts securities as those payments fell in arrears.Richards, p. 119

Vermont was an unrecognized independent republic that had been seeking independent statehood from New York's claims to the territory. It became an unexpected beneficiary of the rebellion by sheltering the rebel ringleaders. Alexander Hamilton broke from other New Yorkers, including major landowners with claims on Vermont territory, calling for the state to recognize and support Vermont's bid for admission to the union. He cited Vermont's de facto independence and its ability to cause trouble by providing support to the discontented from neighboring states, and he introduced legislation that broke the impasse between New York and Vermont. Vermonters responded favorably to the overture by publicly pushing Eli Parsons and Luke Day out of the state (but quietly continuing to support others). Vermont became the fourteenth state after negotiations with New York and the passage of the new constitution.Richards, p. 122

Adoption of the US Constitution Thomas Jefferson was serving as ambassador to France at the time and refused to be alarmed by Shays's Rebellion. He argued in a letter to James Madison on January 30, 1787, that occasional rebellion serves to preserve freedoms. In a letter to William Stephens Smith on November 13, 1787, Jefferson wrote, "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants. It is its natural manure."Foner, p. 219 In contrast, George Washington had been calling for constitutional reform for many years, and he wrote in a letter dated October 31, 1786, to Henry Lee, "You talk, my good sir, of employing influence to appease the present tumults in Massachusetts. I know not where that influence is to be found, or, if attainable, that it would be a proper remedy for the disorders. Influence is not government. Let us have a government by which our lives, liberties, and properties will be secured, or let us know the worst at once."Lodge, p. 2:26Feer, p. 396

At the time of the rebellion, the weaknesses of the federal government as constituted under the Articles of Confederation were apparent to many. A vigorous debate was going on throughout the states on the need for a stronger central government, with Federalists arguing for the idea, and Anti-Federalists opposing them. Historical opinion is divided on what sort of role the rebellion played in the formation and later ratification of the United States Constitution, although most scholars agree that it played some role, at least temporarily drawing some anti-Federalists to the strong government side.Szatmary, p. 120

By early 1785, many influential merchants and political leaders were already agreed that a stronger central government was needed. Shortly after Shays's Rebellion broke out, delegates from five states met in Annapolis, Maryland from September 11–14, 1786, and they concluded that vigorous steps were needed to reform the federal government, but they disbanded because of a lack of full representation and authority, calling for a convention of all the states to be held in Philadelphia in May 1787.Szatmary, p. 122 Historian Robert Feer notes that several prominent figures had hoped that the convention would fail, requiring a larger-scale convention, and French diplomat Louis-Guillaume Otto thought that the convention was intentionally broken off early to achieve this end.Feer, pp. 391–392

In early 1787, John Jay wrote that the rural disturbances and the inability of the central government to fund troops in response made "the inefficiency of the Federal government more and more manifest".Szatmary, p. 123 Henry Knox observed that the uprising in Massachusetts clearly influenced local leaders who had previously opposed a strong federal government. Historian David Szatmary writes that the timing of the rebellion "convinced the elites of sovereign states that the proposed gathering at Philadelphia must take place".Szatmary, p. 127 Some states delayed choosing delegates to the proposed convention, including Massachusetts, in part because it resembled the "extra-legal" conventions organized by the protestors before the rebellion became violent.Feer, p. 393

The convention that met in Philadelphia then was dominated by strong-government advocates.Richards, p. 132 Delegate Oliver Ellsworth of Connecticut argued that because the people could not be trusted (as exemplified by Shays's Rebellion), the members of the federal House of Representatives should be chosen by state legislatures, not by popular vote.Richards, p. 134 The example of Shays's Rebellion may also have been influential in the addition of language to the constitution concerning the ability of states to manage domestic violence, and their ability to demand the return of individuals from other states for trial.Szatmary, p. 130

The rebellion also played a role in the discussion of the number of chief executives the United States would have going forward. While mindful of tyranny, delegates of the Constitutional Convention thought that the single executive would be more effective in responding to national disturbances.

Federalists cited the rebellion as an example of the confederation government's weaknesses, while opponents such as Elbridge Gerry, a merchant speculator and Massachusetts delegate from Essex County, thought that a federal response to the rebellion would have been even worse than that of the state. He was one of the few convention delegates who refused to sign the new constitution, although his reasons for doing so did not stem from the rebellion.Feer, p. 395

When the constitution had been drafted, Massachusetts was viewed by Federalists as a state that might not ratify it, because of widespread anti-Federalist sentiment in the rural parts of the state. Massachusetts Federalists, including Henry Knox, were active in courting swing votes in the debates leading up to the state's ratifying convention in 1788. When the vote was taken on February 6, 1788, representatives of rural communities involved in the rebellion voted against ratification by a wide margin, but the day was carried by a coalition of merchants, urban elites, and market town leaders. The state ratified the constitution by a vote of 187 to 168.Szatmary, p. 133

Historians are divided on the impact the rebellion had on the ratification debates. Robert Feer notes that major Federalist pamphleteers rarely mentioned it and that some anti-Federalists used the fact that Massachusetts survived the rebellion as evidence that a new constitution was unnecessary.Feer, p. 404 Leonard Richards counters that publications like the Pennsylvania Gazette explicitly tied anti-Federalist opinion to the rebel cause, calling opponents of the new constitution "Shaysites" and the Federalists "Washingtonians".Richards, p. 139