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Mexico gains independence from Spain with the signing of the Treaty of Córdoba. -
First Mexican Empire under Agustin de Iturbide, who is later overthrown. -
Mexico adopts its first constitution, establishing a federal republic. -
Political instability with frequent leadership changes, including Antonio López de Santa Anna's multiple presidencies.
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Texas Revolution leads to Texas declaring independence from Mexico. -
Mexican-American War; Mexico loses almost half its territory to the U.S. in the Treaty of Guadalupe Hidalgo. -
Gadsden Purchase; Mexico sells land to the U.S.
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Liberal Constitution of 1857 is enacted, leading to conflict between conservatives and liberals.
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Reform War, a civil war between liberals and conservatives.
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Battle of Puebla (Cinco de Mayo); Mexico temporarily defeats French forces.
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Emperor Maximilian I is installed by Napoleon III but later executed.