The Revolt of the Comuneros was a popular uprising in the Viceroyalty of New Granada (now Colombia and parts of Venezuela) against the Spanish authorities from March through October 1781. The revolt was in reaction to the increase in taxation to raise funds for defense of the region against the British, a rise in the price of tobacco and brandy, which were part of the late eighteenth-century Bourbon reforms. The initial revolt was local and not well known outside the region of Socorro, but in the late nineteenth century, historian Manuel Briceño saw the massive revolt as a precursor to independence. Prior to the 1781 revolt, residents in New Granada had protested, at times violently, crown policy implementation there between 1740 and 1779.
On March 16, 1781, in Socorro in northeastern Colombia, grocer Manuela Beltrán tore down posted edicts about new tax increases and other changes that would have reduced the profits of the colonists and enlarged the benefits of Spain. Many other towns in New Granada began to have the same occurrences with colonists livid about the conditions of the ruling government. Local residents began to assemble and elect a body of officials known as el común, or a central committee "to lead the movement." The rebels unified under the leadership of Juan Francisco Berbeo, a Criollo elite. Despite coming from the upper classes of society, the rebels introduced the idea of unifying and organising the diverse social classes comprising common people; the endorsement of the elites improved the rebels' efforts to unify, where Berbeo consolidated 10,000 to 20,000 rebel troops to march on Bogotá, the capital. Once the rebels defeated the rival soldiers sent from Bogotá, they reached a town slightly north of it, where Spanish officials agreed to meet with the Comuneros and sign an agreement stating the conditions and complaints of the rebels. However, once the rebels disbanded, the Spanish government officials signed a document that discarded the agreement on the basis that it was forced upon them. Once reinforcements for the Spanish government arrived, they were sent to rebellious cities and towns to enforce the implementation of the increased taxes. José Antonio Galán, one of the leaders of the revolt, continued on with a small number of rebels, but they were quickly defeated and he was executed, while other leaders of the rebellion were sentenced for life in prison for treason.
The influence of the revolt led to similar uprisings, with a similar outcome, as far north as Mérida and Timotes, now in Venezuela but at the time under jurisdiction of the Viceroyalty of New Granada.
Many causes contributed to the revolt of 1781. Some were long-standing, related to the viceroyalty in New Granada in 1717. There is a debate among historians over what the main factor was, but what is clear is that the need for economic and political reform and the idea of self-government were contributors.
A series of reforms to the economy and government of the colonies, now called the Bourbon Reforms, are believed to be a factor. As the growth of the population and economy of the New World began to outgrow that of Spain, Spain began to look for ways to make the colonies more profitable. The Spanish government sought to eliminate tax evasion to reduce benefits of the colonies and created new laws and taxes to establish greater support and a larger revenue for the home country. Spain also created trading companies, allowed for agricultural and industrial "royal monopolies" and encouraged a greater amount of imports to the colonies to decrease the manufacturing capability of the colonies. These economic and social reforms increased the limitations for colonists to produce crops and changed their economy. Another factor considered by scholars is the major political reforms that the Spanish government forced on the colonies. In order for Spain to benefit economically from the colonies, it needed stricter control over their government. These political changes were also part of the Bourbon Reforms. Some historians such as Brian Hamnett believe that it was the age-long battle between "absolutism versus the unwritten constitution" of New Granada that spurred on the colonists. He believes that the imperialism of the Spanish home country and its dependence upon the colonies contributed for the need of the colonies' "decentralization." In a review of John Leddy Phelan's book on the Comunero revolt, Hamnett states that the revolt was started, not with the goal of an independence movement, political freedom and self-government, but only with the hope of reversing the reforms.