Jacobo Árbenz in the context of Ministry of Defence (Guatemala)

The period in the history of Guatemala between the coups against Jorge Ubico in 1944 and Jacobo Árbenz in 1954 is known locally as the Revolution (Spanish: La Revolución). It has also been called the Ten Years of Spring, highlighting the peak years of representative democracy in Guatemala from 1944 until the end of the civil war in 1996. It saw the implementation of social, political, and especially agrarian reforms that were influential across Latin America.

From the late 19th century until 1944, Guatemala was governed by a series of authoritarian rulers who sought to strengthen the economy by supporting the export of coffee. Between 1898 and 1920, Manuel Estrada Cabrera granted significant concessions to the United Fruit Company, an American corporation that traded in tropical fruit, and dispossessed many indigenous people of their communal lands. Under Jorge Ubico, who ruled as a dictator between 1931 and 1944, this process was intensified, with the institution of harsh labor regulations and a police state.

The 1954 Guatemalan coup d'état (Spanish: Golpe de Estado en Guatemala de 1954) deposed the democratically elected Guatemalan president Jacobo Árbenz and marked the end of the Guatemalan Revolution. The coup installed the military dictatorship of Carlos Castillo Armas, the first in a series of U.S.-backed authoritarian rulers in Guatemala. The coup was precipitated by a CIA covert operation code-named PBSuccess.

The Guatemalan Revolution began in 1944, after a popular uprising toppled the military dictatorship of Jorge Ubico. Juan José Arévalo was elected president in Guatemala's first democratic election. He introduced a minimum wage and near-universal suffrage. Arévalo was succeeded in 1951 by Árbenz, who instituted land reforms which granted property to landless peasants. The Guatemalan Revolution was disliked by the U.S. federal government, which was predisposed during the Cold War to see it as communist. This perception grew after Árbenz had been elected and formally legalized the communist Guatemalan Party of Labour. The U.S. government feared that Guatemala's example could inspire nationalists wanting social reform throughout Latin America. The United Fruit Company (UFC), whose highly profitable business had been affected by the softening of exploitative labor practices in Guatemala, engaged in an influential lobbying campaign to persuade the U.S. to overthrow the Guatemalan government. U.S. president Harry S. Truman authorized Operation PBFortune to topple Árbenz in 1952, which was a precursor to PBSuccess.

Carlos Castillo Armas (locally ['kaɾlos kas'tiʝo 'aɾmas]; 4 November 1914 – 26 July 1957) was a Guatemalan military officer and politician who was the 28th president of Guatemala, serving from 1954 to 1957 after taking power in a coup d'état. A member of the far-right National Liberation Movement (MLN) party, his authoritarian government was closely allied with the United States.

Born to a planter, out of wedlock, Castillo Armas was educated at Guatemala's military academy. A protégé of Colonel Francisco Javier Arana, he joined Arana's forces during the 1944 uprising against President Federico Ponce Vaides. This began the Guatemalan Revolution and the introduction of representative democracy to the country. Castillo Armas joined the General Staff and became director of the military academy. Arana and Castillo Armas opposed the newly elected government of Juan José Arévalo; after Arana's failed 1949 coup, Castillo Armas went into exile in Honduras. Seeking support for another revolt, he came to the attention of the US Central Intelligence Agency (CIA). In 1950 he launched a failed assault on Guatemala City, before escaping back to Honduras. Influenced by lobbying by the United Fruit Company and Cold War fears of communism, in 1952 the US government of President Harry Truman authorized Operation PBFortune, a plot to overthrow Arévalo's successor, President Jacobo Árbenz. Castillo Armas was to lead the coup, but the plan was abandoned before being revived in a new form by US President Dwight D. Eisenhower in 1953.

Juan José Arévalo Bermejo (10 September 1904 – 8 October 1990) was a Guatemalan statesman and professor of philosophy who became Guatemala's first democratically elected president in 1945. He was elected following a popular uprising against the United States-backed dictator Jorge Ubico that began the Guatemalan Revolution. He remained in office until 1951, surviving 25 coup attempts. He did not contest the election of 1951, instead choosing to hand over power to Jacobo Árbenz. As president, he enacted several social reform policies, including an increase in the minimum wage and a series of literacy programs. He also oversaw the drafting of a new constitution in 1945. His son, Bernardo, became President of Guatemala in 2024.

Because of his reforms and policies that transcended his time, Juan José Arévalo is considered the most popular and influential president in the history of Guatemala.

Presidential elections were held in Guatemala between 17 and 19 December 1944. The October Revolution had overthrown Jorge Ubico, the American-backed dictator, after which a junta composed of Francisco Javier Arana, Jacobo Árbenz and Jorge Toriello took power, and quickly announced presidential elections, as well as elections for a constitutional assembly. The subsequent elections were broadly considered free and fair, although only literate men were given the vote. Unlike in similar historical situations, none of the junta members stood for election. The front-runner was the university professor Juan José Arévalo, nominated by the National Renovation Party. His closest challenger was Adrián Recinos, whose campaign included a number of individuals identified with the Ubico regime. The ballots were tallied on 19 December and Arévalo won in a landslide with 86.25% of the vote, receiving more than four times as many votes as the other candidates combined. The Constitutional Assembly elections took place on 28–30 December, with the United Front of Arevalist Parties winning 50 of the 65 seats.

Operation PBFortune, also known as Operation Fortune, was a covert United States operation to overthrow the democratically elected Guatemalan President Jacobo Árbenz in 1952. The operation was authorized by U.S. President Harry Truman and planned by the Central Intelligence Agency. The United Fruit Company had lobbied intensively for the overthrow because land reform initiated by Árbenz threatened its economic interests. The US also feared that the government of Árbenz was being influenced by communists.

The coup attempt was planned with the support of the United Fruit Company and of Anastasio Somoza García, Rafael Trujillo and Marcos Pérez Jiménez, the US-backed right-wing dictators of Nicaragua, the Dominican Republic, and Venezuela respectively, who felt threatened by the democratic Guatemalan Revolution, and had sought to undermine it. The plan involved providing weapons to the exiled Guatemalan military officer Carlos Castillo Armas, who was to lead an invasion from Nicaragua.

Ernesto "Che" Guevara (14 May 1928 – 9 October 1967) was an Argentine Marxist revolutionary, physician, author, guerrilla leader, diplomat, politician and military theorist. A major figure of the Cuban Revolution, his stylized visage has become a countercultural symbol of rebellion and global insignia in popular culture.

As a young medical student, Guevara travelled throughout South America and was appalled by the poverty, hunger, and disease he witnessed. His burgeoning desire to help overturn what he saw as the capitalist exploitation of Latin America by the United States prompted his involvement in Guatemala's social reforms under President Jacobo Árbenz, whose eventual CIA-assisted overthrow at the behest of the United Fruit Company solidified Guevara's political ideology. Later in Mexico City, Guevara met Raúl and Fidel Castro, joined their 26th of July Movement, and sailed to Cuba aboard the yacht Granma with the intention of overthrowing US-backed dictator Fulgencio Batista. Guevara soon rose to prominence among the insurgents, was promoted to second-in-command, and played a pivotal role in the two-year guerrilla campaign which deposed the Batista regime.

José Manuel Fortuny Arana (22 March 1916 – 18 March 2005) was an important communist leader in Latin America. He became well known for his friendship with Guatemalan President Jacobo Árbenz, and was one of the main advisers in his government, which lasted from 1951–54. Árbenz was overthrown by a coup engineered by the United States in 1954, an event which drove Fortuny into exile, along with many of his comrades.

The National Renovation Party (Spanish: Partido Renovación Nacional, PRN) was a reformist and progressive political party in Guatemala that was supportive of the government of Jacobo Arbenz. The PRN was founded by a group of the young revolutionaries on 1 July 1944, following the overthrow of dictator Jorge Ubico and the beginning of the Guatemalan Revolution. Its founders included Juan José Orozco Posadas, and Mario Efraín Nájera Farfán. The PRN was known as a “teachers' party”, in contrast to the Popular Liberation Front (FPL), which was seen as a "students' party”. During this period the PRN and the FPL were the largest of the revolutionary parties.

In the 1944 elections, the first democratic elections that had been held in the country, the PRN nominated Juan José Arévalo as its candidate. In November 1945 it merged with the FPL to form the Revolutionary Action Party (PAR) but split from it eighteen months later. This split was partially the result of ideological differences, and partially the result of manipulations by Arévalo, who preferred to deal with a fractured opposition. After some hesitation the PRN joined the Party of the Guatemalan Revolution in June 1952, but withdrew a month later. PRN was the smallest party in the coalition governments of Jacobo Árbenz (1951-1954). It was disbanded after the coup d'état of 1954.