“ He was engaged on active service on the south-west frontier and in Mexico, and afterwards in Indian warfare in Washington and Oregon territories, becoming first lieutenant in 1845, captain in 1847, and major in 1861. In the latter year, on the outbreak of the Civil War, he became a colonel of volunteer cavalry in the Federal army, rising early in 1862 to the rank of brigadier-general U.S.V., and to the chief command of the cavalry in the Missouri department. ”