Matthew Duggan joined the US Regular Army in 1858. He was 20 years old. He was assigned to the 5th Infantry Co. (sorry the first one isn't as clear as I would have liked. The rest are considerably better)
1863 re-enlistment in the 5th Infantry at Los Pinos, New Mexico
Matthew's re-enlistment in the 2nd Battalion of Engineers on March 17, 1868 at St. Louis, Missouri
Matthew's re-enlistment in New Orleans, Louisanna on March 17th, 1871 in the 19th Infantry Co K.
Matthew's re-enlistment at Ringgold Barracks, Texas on March 11th, 1876 as Sergeant Ordinance Department
Matthew's re-enlistment at Fort Stockton, Texas on March 11th, 1881 as Sergeant Ordiance Deparment
Matthew's last re-enlistment at Fort Columbus, New York on March 11th, 2010
http://clickserve.cc-dt.com/link/tplclick?lid=41000000029953452&pubid=21000000000250976
MATTHEW'S ENLISTMENT PAPERS