On July 7, 1846, a major change came to Monterey. Commodore John D. Sloat raised the U.S. flag over the Custom House.
California was still part of Mexico. The Mexican-American War had begun, and the Pacific coast was now part of a much larger fight.
The flag was more than a symbol. It marked a new claim to power.
Why Monterey Mattered
Monterey had served as the capital of Mexican California. It was a center for trade, law, customs, and government.
The Custom House mattered because ships paid duties there. Money collected at the port helped support the government.
The National Park Service explains the role of the Old Custom House in Monterey and its place in the shift from Mexican to U.S. rule.
The change in Monterey was part of a wider story of U.S. growth. Just one year earlier, the country had moved to annex Texas and bring it into the Union.
The Bear Flag Revolt
The Monterey event came just after the Bear Flag Revolt in Sonoma. American settlers there had declared a short-lived California Republic.
That local revolt soon gave way to U.S. military action. California’s future was now tied to war, diplomacy, and national expansion.
Other places also moved through the long path from territory to state. Our story on Tucson as a frontier city in territorial Arizona shows how long those transitions could last.
A Change With Many Costs
For some people, U.S. control looked like new trade and new chances. For others, it meant lost power, land, or safety.
Californios saw their political world change. Native people faced more violence and land loss. New settlers saw room to grow.
That mix of gain and loss also appears in the story of the 1821 transfer of Florida.
California Then and Now
The old Custom House still stands in Monterey. It gives visitors a real place to connect with this turning point.
California’s land still shapes life in the state. Tuars looks at one modern example in its article on California wildfires and the air people breathe.
Readers who want a simple reference can browse a California history book on Amazon.
July 7, 1846, remains a key date. It marks the moment U.S. military control became clear in Monterey and a new chapter in California began.