General Herkimer Ware.
The Second Battle of Williams Pass was a military engagement that took place late in the Rocky Mountain War of 1845 - 1855.
The victory of the Liberty Party under Assemblyman Hector Niles in the 1851 Mexican elections convinced North American Governor-General Henry Gilpin that victory over the United States of Mexico was at hand, and in spite of the terrible losses suffered by two North American armies at the First Battle of Williams Pass from November 1850 to March 1851, Gilpin was determined to continue the war against the U.S.M.
In 1852 Gilpin sent another North American army led by General Herkimer Ware to try to force its way through Williams Pass and capture San Francisco, the capital of the Mexican state of California. However, Ware's army was plagued with desertions and mutinies, and when he reached Williams Pass he was defeated by a Mexican regiment led by Colonel Miguel Fernandez and aided by Indian auxiliaries led by War Chief Brave Eagle.
The Second Battle of Williams Pass was the last major conflict of the Rocky Mountain War, and the defeat there contributed to Gilpin's decision to retire in February 1853.