The Battle of Santa Rosa was a significant conflict during the Mexican-American War, occurring on March 28, 1847. This battle took place near the town of Santa Rosa, in present-day California. American forces, led by General John C. Frémont, aimed to secure the region against Mexican troops. The battle was part of a larger campaign to gain control over California. The engagement resulted in a decisive victory for the American forces, contributing to their overall success in the war. Following the battle, American troops continued their advance, ultimately leading to the annexation of California and other territories as part of the Treaty of Guadalupe Hidalgo.