The Mexican-American War Comes to California

The Mexican-American War was a conflict between Mexico and the United States from 1846 to 1848. During this war, California was under Mexican rule. The United States wanted to expand its land all the way to the Pacific Ocean. This goal was called westward expansion.

In 1846, American settlers in California started an uprising known as the Bear Flag Revolt. They wanted California to become part of the United States, not Mexico. At the same time, U.S. troops entered California. They fought battles against Mexican soldiers in several towns, including Los Angeles and San Diego.

By 1847, most of California was controlled by the United States military. The war was difficult for both sides. Some Californios, who were people living in California under Mexican rule, tried to fight back. However, they were outnumbered by the U.S. army.

In 1848, the war ended with the signing of the Treaty of Guadalupe Hidalgo. This treaty was a formal agreement between Mexico and the United States. The treaty gave California and other lands to the United States. In return, the United States paid Mexico $15 million and promised to protect the rights of people living in these new territories.

The change from Mexican to American rule was a big territorial change. It changed the government, laws, and culture in California. American settlers began to arrive in large numbers. Many people came looking for gold after the Gold Rush began in 1848. This caused towns to grow quickly and brought many new cultures together.

The Mexican-American War and the Treaty of Guadalupe Hidalgo transformed California. It became a part of the United States and started a new chapter in its history. The war showed the bravery of people on both sides and the importance of working for peace.

Interesting Fact: The Treaty of Guadalupe Hidalgo added more than 500,000 square miles of land to the United States, including California, Nevada, Utah, and parts of Arizona, New Mexico, Colorado, and Wyoming.