Robert W. McGuire, Jr.
United States Army
October 26, 1804
March 2, 1875
Lorenzo Thomas graduated from West Point in 1823. As a career Army officer, he fought in the Seminole War in Florida, and during the Mexican–American War, he was chief of staff to General William Butler. From 1853 to 1861 he was chief of staff to General of the Army Winfield Scott. In March 1861 he was appointed adjutant general of the Army, a position he held until his retirement in 1869.
GEN Thomas did not get along with Secretary of War Edwin Stanton, who assigned him to recruit African American troops in the South from 1863 to 1865. After Lincoln’s murder, President Andrew Johnson decided to fire Stanton and replace him with Thomas on an ad interim basis, an action that led to Johnson’s impeachment. Thomas died at his residence in Washington City in 1875.
Record of Military Service
July 1, 1823—Graduated US Military Academy, assigned to duty as a 2nd Lieutenant, 4th US Infantry
1824-1831—Service in 4th US Infantry
March 17, 1829—Promoted to 1st Lieutenant, 4th US Infantry
1833-1836—Adjutant General’s Office, Washington DC
1836-1837—Quatermaster duty in Florida Seminole War
September 23, 1836—Promoted to Captain, 4th US Infantry
1836-1837—Quartermaster General’s Office, Washington DC
July 7, 1838—Promoted to Major, Assistant Adjutant General
1846-1848—Mexican War, adjutant general and chief of staff to General Butler
1852—Promoted to Lieutenant Colonel
1853-1861—Chief of Staff to General of the Army Winfield Scott
March 7, 1861—Promoted to Colonel and Adjutant General of the Army
August 10, 1861—Promoted to Brigadier General
1863-1865—Special Assignment recruiting colored regiments
March 8, 1866—Promoted to Major General
February 22, 1869—Retired