He was also President of the Aztec Club of 1847 from 1867 to 1881. Patterson widely criticized for his failure to contain the enemy forces received an honorable discharge and mustered out of the Army in late July 1861. During the onset of the latter he commanded a brief engagement with Colonel Thomas J.
Shortly after First Bull Run the three-month term of the volunteers who comprised a majority of his army expired Patterson was honorably discharged with them and his active military career ended. Robert Patterson (January 20 1792 – August 7 1881) was a United States major general during the Mexican-American War and the American Civil War. His inability to contain a smaller Confederate army under General Joseph E.