Siege of Mexico City

Siege of Mexico City
	Part of the Second French intervention in Mexico
	; Austrian volunteers in Mexico, 1866
Date	12 April – 21 June 1867 ; (2 months, 1 week and 2 days)
Location	Mexico City, Mexico
Result	Mexican Republican victory Collapse of the Second Mexican Empire; Withdrawal of the French from Mexico;
Belligerents
Mexican Empire; France; Austria-Hungary;	Mexico; American volunteers;
Commanders and leaders
Leonardo Márquez (POW) ; Ramon Tabera (POW) ; Tomás O'Horán [a]; Santiago Vidaurri (POW) ; Manuel Ramirez Arellano (POW); Johann Karl Khevenhüller Armin Freiherr von Hammerstein-Equord † ; Alfons von Kodolitsch ; János Csizmadia	Porfirio Díaz; Félix Díaz; Manuel González Flores; Venancio Leyva; Edelmiro Mayer; Mariano Escobedo; John Sobieski
Units involved
1st brigade of infantry; Regiment of Quiroga 18th regiment of infantry; Regiment of chasseurs à cheval (French light cavalry); Regiment of gendarmes Regiment of hussars	Eastern Army; American Legion of Honor
Casualties and losses
100+ killed; 304 wounded; 1,000 captured	Unknown

The siege of Mexico City was an 1867 military engagement in the Second French intervention in Mexico between Republican forces, aided by the United States, and Emperor Maximilian's troops, aided by the French Empire and Austria-Hungary, encompassing in the siege of the city. It was the last armed conflict of the Second Mexican Empire and the fall of the city resulted in the transition of the Empire into the Republic led by Benito Juárez.^: 283