French Intervention and Second Mexican Empire
1861–1867
After Mexico suspended foreign-debt payments, Britain, France, and Spain intervened. After Britain and Spain withdrew, Napoleon III's France continued the war. Maximilian's French-backed empire collapsed amid republican resistance and French withdrawal, and the republic was restored in 1867.

- Period
- 1861–1867
- Kind
- War
- Regions
- Latin America, Europe, North America
- Keywords
- Reform War · foreign debt · Puebla · Second Mexican Empire · Querétaro · Restored Republic
Follow the story · Four stages
Background
When the Reform War ended in a liberal victory in 1861, the government's finances were exhausted. The Juárez government's debt suspension and the 1861 London Convention directly precipitated tripartite military action.
- The Reform War ended in a Liberal victory but left state finances exhausted
- The Juárez government's suspension of foreign-debt payments directly precipitated intervention
- Britain, France, and Spain agreed on joint action in London and sent forces to Veracruz

Course
The intervention forces landed at Veracruz. After an initial defeat at Puebla in May 1862, French troops occupied Mexico City in 1863, and Maximilian accepted the throne with conservative support in 1864.
- France continued the military intervention alone after Britain and Spain withdrew
- After defeat at Puebla in 1862, French troops occupied Mexico City in 1863
- Backed by French power and Mexican conservatives, Maximilian became ruler of the Second Empire in 1864

Outcome
After French troops withdrew, republican forces captured Maximilian at Querétaro in 1867 and executed him after trial. The Juárez government returned to Mexico City and restored the republic.
- Mexican republican resistance, French military and financial burdens, and U.S. pressure combined before the French withdrawal
- After that withdrawal, Mexican republican forces defeated Mexican imperial forces at Querétaro and captured Maximilian
- Maximilian was executed after trial, and the Juárez government returned to the capital to restore the republic

Historical significance
The failure of the French-backed monarchy secured the Mexican republic and checked a direct European attempt to establish a monarchy. Mexican resistance, French military and financial burdens, and U.S. pressure are treated as interacting causes.
- The republican victory secured Mexico's republic and national sovereignty
- It checked a European effort to establish monarchy in Mexico through military power
- French withdrawal cannot be reduced to the Monroe Doctrine alone; multiple causes and Mexican agency mattered

Related figures

Napoleon III
French emperor who drove the intervention
He continued the intervention after Britain and Spain withdrew and used French troops to sustain Maximilian's Second Empire.

Maximilian I of Mexico
Ruler of the Second Mexican Empire
He accepted the French-backed throne in 1864 and was defeated by republican forces at Querétaro in 1867 after the French withdrawal.
Related events
1858–1861
Reform War

Civil war between Liberals and Conservatives ended in a Liberal victory in 1861 but exhausted state finances.
1861–1861
Debt suspension and London Convention

After the Juárez government suspended debt payments, Britain, France, and Spain agreed on intervention and sent forces to Veracruz.
1861–1867
French intervention and Second Empire
Current event

An empire sustained by French invasion and occupation collapsed amid republican resistance and French withdrawal.
1867–1876
Restored Mexican Republic

The Juárez government returned to Mexico City in 1867, beginning a restored republican period that continued through 1876.
1867–1867
European monarchical intervention checked

The Second Empire's collapse ended a European effort to establish monarchy directly in Mexico.
Sources
- French Intervention in Mexico and the American Civil WarOffice of the Historian, U.S. Department of StateA diplomatic-history account of the debt crisis, tripartite intervention, Napoleon III's aims, U.S. pressure, French withdrawal, and republican restoration.
- Intervención francesa y Segundo ImperioInstituto Nacional de Antropología e HistoriaA Mexican national-institution account of Puebla, the occupation of Mexico City, and the Second Empire's rise and fall.
- El Segundo ImperioInstituto Nacional de Estudios Históricos de las Revoluciones de MéxicoAn account of Napoleon III's intervention, Maximilian's rule, the loss of French support, and republican victory.
- Historia constitucional de MéxicoMuseo de las Constituciones, Universidad Nacional Autónoma de MéxicoA constitutional timeline positioning the Reform War, intervention and empire, and the Restored Republic from 1867 to 1876.
- Toma de Querétaro, 15 de mayo de 1867Secretaría de la Defensa Nacional, Gobierno de MéxicoA military-history account of the republican siege after the French withdrawal, entry into Querétaro, and Maximilian's surrender.
