This is a military question more than a WW I question, but as the time period is near abouts so I thought I'd take a chance that someone here might have an answer to my questions. My great uncle is found enlisting in the U.S. Army in August of 1918. His Company and Regiment was ( as best as I can read ) 154 D.B. 12th Company ( and here's where the handwriting gets wonky ) Tr(?) Bn. He was discharged in January of 1919 from Camp Mede, Maryland. The document from which I found this was the U.S. National Homes for Disabled Volunteer Soldiers, 1866-1938 Record at Ancestry.com. I gathered he must have died in a Veteran's home...or maybe not. Does anyone know what the abbreviation for cause of discharge O. M. D. means? These initials were crossed out and replaced with O. N. Could anyone tell me anything about this Company and if anyone can help me with the military/or medical lingo I'd be very appreciative. Thanks.