The Capture of Yerba Buena was a pivotal moment in the Mexican-American War, marking a strategic victory for the United States. On July 9, 1846, the U.S. Navy seized the town of Yerba Buena, now known as San Francisco, without firing a single shot. This event was part of a broader strategy to control key ports and cities in California, which was then under Mexican rule. The capture not only demonstrated military prowess but also set the stage for the expansion
of American influence on the West Coast.
The Prelude to Capture
Six months before the United States officially declared war on Mexico, President James Polk had already set plans in motion to secure California. He instructed the U.S. Navy's Pacific Squadron to occupy important ports and cities in the region. This preemptive strategy was designed to ensure that the U.S. could quickly establish control once war was declared. The orders were clear: use force if necessary, but occupy these strategic locations to prevent any Mexican counteraction.
The town of Yerba Buena was a prime target due to its location on the San Francisco Peninsula. It served as a key anchorage and trading post, making it a valuable asset for controlling maritime activities in the area. The U.S. Navy's presence in San Francisco Bay, particularly the USS Portsmouth, played a crucial role in monitoring the situation and supporting the Bear Flag uprising, which was part of the larger American effort to claim California.
The Day of the Capture
On July 8, 1846, Captain John B. Montgomery received orders from Commodore Sloat to capture Yerba Buena. The USS Portsmouth, with its 220 sailors and 27 marines, was strategically positioned off the shore of Yerba Buena Cove. Early the next morning, a small detachment of marines and sailors landed in rowboats to secure the entry of Montgomery and his officers.
The landing was met with little resistance. The local Californios, American settlers, and a few Mexican military personnel gathered to watch as the American forces paraded into the town square, playing "Yankee Doodle" on fife and drum. Montgomery read a proclamation declaring California as American territory, assuring the onlookers that the occupation would not be oppressive. The American flag was raised, and the USS Portsmouth fired a 21-gun salute, marking the peaceful transition of power.
Aftermath and Legacy
Following the capture, Montgomery ordered the seizure of the Presidio of San Francisco and the construction of a military battery at the foot of Telegraph Hill. This fortification, later known as Battery Street, solidified American control over the area. The town of Yerba Buena was soon renamed San Francisco, reflecting its new identity as part of the United States.
The capture of Yerba Buena was a significant milestone in the Mexican-American War, showcasing the strategic foresight and military efficiency of the U.S. forces. It laid the groundwork for the eventual American dominance of California, contributing to the expansion of the United States across the continent.
