Peter O’Brien
Born: 1842 at Dublin, Ireland
Home Town: New York, New York
Medal of Honor
American Civil War
U.S. Army
Date of Issue: March 26, 1865
The President of the United States of America, in the name of Congress, takes pleasure in presenting the Medal of Honor to Private Peter O’Brien, United States Army, for extraordinary heroism on 2 March 1865, while serving with Company A, 1st New York Cavalry (Lincoln), in action at Waynesboro, Virginia, for capture of flag and of a Confederate officer with his horse and equipment.