Ten Tragic Days in the context of "Álvaro Obregón"

The Federal Army (Spanish: Ejército Federal), also known as the Federales (English: Federals) in popular culture, was the army of Mexico from 1876 to 1914 during the Porfiriato, the rule of President Porfirio Díaz, and during the presidencies of Francisco I. Madero and Victoriano Huerta. Under President Díaz, a military hero against the French Intervention in Mexico, the senior officers of the Federal Army had served in long-ago conflicts; at the time of the outbreak of the Mexican Revolution, most were old men, incapable of leading troops on the battlefield. When the rebellions broke out against Díaz following fraudulent elections in 1910, the Federal Army was incapable of responding.

Although revolutionary fighters helped bring Francisco I. Madero to power, Madero retained the Federal Army rather than the revolutionaries. Madero used the Federal Army to suppress rebellions against his government by Pascual Orozco and Emiliano Zapata. Madero placed General Victoriano Huerta as interim commander of the military during the Ten Tragic Days of February 1913 to defend his government. Huerta changed sides and ousted Madero's government. Rebellions broke out against Huerta's regime. When revolutionary armies succeeded in ousting Huerta in July 1914, the Federal Army ceased to exist as an entity, with the signing of the Teoloyucan Treaties.

Francisco Ignacio Madero González (Spanish pronunciation: [fɾanˈsisko jɣˈnasjo maˈðeɾo ɣonˈsales]; 30 October 1873 – 22 February 1913) was a Mexican businessman, revolutionary, writer, politician and statesman who served as the 37th president of Mexico from 1911 until he was deposed and assassinated in a coup d'état in February 1913. He came to prominence as an advocate for democracy and as an opponent of President and dictator Porfirio Díaz. After Díaz claimed to have won the fraudulent election of 1910 despite promising a return to democracy, Madero started the Mexican Revolution to oust Díaz. The Mexican revolution would continue until 1920, well after Madero and Díaz's deaths, with hundreds of thousands dead.

A member of one of Mexico's wealthiest families, Madero studied business at the École des Hautes Études Commerciales de Paris. An advocate for social justice and democracy, his 1908 book The Presidential Succession in 1910 called for Mexican voters to prevent the reelection of Porfirio Díaz, whose regime had become increasingly authoritarian. Bankrolling the opposition Anti-Reelectionist Party, Madero's candidacy garnered widespread support in the country. He challenged Díaz in the 1910 election, which resulted in his arrest. After Díaz declared himself winner for an eighth term in a rigged election, Madero escaped from jail, fled to the United States, and called for the overthrow of the Díaz regime in the Plan of San Luis Potosí, sparking the Mexican Revolution.

José Venustiano Carranza de la Garza (Spanish pronunciation: [benusˈtjano kaˈransa ðe la ˈɣaɾsa]; 29 December 1859 – 21 May 1920), known as Venustiano Carranza, was a Mexican land owner, revolutionary, and politician who served as the 44th President of Mexico from 1917 until his assassination in 1920, during the Mexican Revolution. He was previously Mexico's de facto head of state as Primer Jefe (Spanish: "First Chief") of the Constitutionalist faction from 1914 to 1917, and previously served as a senator and governor for Coahuila. He played the leading role in drafting the Constitution of 1917 and maintained Mexican neutrality in World War I.

Born in Coahuila to a prominent landowning family, he served as a senator for his state during the Porfiriato, appointed by President and dictator Porfirio Díaz. After becoming alienated from Díaz, he supported the Liberal Francisco Madero's challenge to Díaz during the 1910 presidential election. Madero was defeated in a sham election and imprisoned. Madero ordered an overthrow of the government, sparking the Mexican Revolution, and Díaz resigned in May 1911. As president, Madero appointed Carranza as the governor of Coahuila. When Madero was murdered during the counter-revolutionary Ten Tragic Days coup in February 1913, Carranza drew up the Plan of Guadalupe, a political strategy to oust Madero's usurper, General Victoriano Huerta. Carranza organized militias loyal to his state and allied northern states in Mexico into a professional army, the Constitutional Army, to oppose Huerta. The Constitutionalists defeated Huerta's Federal Army and Huerta was ousted in July 1914. Carranza did not assume the title of provisional president of Mexico, as called for in his Plan of Guadalupe, since it would have prevented his running for constitutional president once elections were held. Furthermore his government in this period was in a pre-constitutional, extralegal state, to which both his best generals, Álvaro Obregón and Pancho Villa, objected to Carranza's seizure of the national presidency.

José Victoriano Huerta Márquez (Spanish pronunciation: [biɣtoˈɾjano ˈweɾta]; 23 December 1850 – 13 January 1916) was a Mexican general, politician, engineer, and dictator who served as the 39th President of Mexico from 1913 to 1914 and came to power by coup against the democratically elected government of Francisco I. Madero with the aid of other Mexican generals and the U.S. Ambassador to Mexico. Establishing a military dictatorship, his violent seizure of power set off a new wave of armed conflict in the Mexican Revolution.

After a military career under President and dictator Porfirio Díaz and Interim President Francisco León de la Barra, Huerta became a high-ranking officer during the presidency of Madero during the first phase of the Mexican Revolution (1911–13). In February 1913, Huerta joined a conspiracy against Madero, who entrusted him to control a revolt in Mexico City. The Ten Tragic Days – actually fifteen days – saw the forced resignation of Madero and his vice president and their murders. The coup was backed by the German Empire as well as the United States under the Taft administration. But the succeeding Wilson administration refused to recognize the new regime which had come to power by coup. The U.S. allowed arms sales to rebel forces. Many foreign powers did recognize the regime, including Britain and Germany, but withdrew further support when revolutionary forces started to show military success against the regime; their continuing support of him threatened their own relationships with the U.S. government.

The Constitutional Army (Spanish: Ejército constitucional), also known as the Constitutionalist Army (Spanish: Ejército constitucionalista), was the army that fought against the Federal Army, and later, against the Villistas and Zapatistas during the Mexican Revolution. It was formed in March 1913 by Venustiano Carranza, so-called "First-Chief" of the army, as a response to the murder of President Francisco I. Madero and Vice President José María Pino Suárez by Victoriano Huerta during La Decena Trágica (Ten Tragic Days) of 1913, and the resulting usurpation of presidential power by Huerta.

Carranza had a few military forces on which he could rely for loyalty. He had the theoretical support of Pancho Villa and Emiliano Zapata, but they soon turned against the Constitutionalists after Huerta's defeat in 1914.