This second-largest city in the United States, known in the vernacular by its initialism, L.A., was founded as a city in 1781, but claimed as Spanish territory by Juan Rodriguez Cabrillo in 1542. The city became Mexican territory in 1821 after the Mexican War of Independence. Then, in 1848 (a momentous year in world history, to say the least), after the Mexican-American War, following the Treaty of Guadalupe Hidalgo, the United States purchased the territory that became the state of California two years later, in 1850.
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