LIEUT. JOHN MICHAEL O’CONOR, U. S. A.
Hon. John D. Crimmins of New York City, in one of his books speaks of John Michael O’Conor. The latter was a native of New York; lieutenant in the Third U. S. Artillery, 1812; later, regimental quartermaster; was made captain in the spring of 1813; June 20, 1814, he was appointed assistant adjutant-general under Gardner, on Gen. Brown’s staff, and held the rank at the time of the battle of Chippewa, in which he participated. He left the army in 1821. He translated, in 1824, for the U. S. Military Academy at West Point, Guy de Vernon’s Science of War and Fortifications.