Thank you for taking the time to respond. Unfortunately my attempts to learn more at the Maine State Archives was unsuccessful. Records for the Aroostook War seem to be scarce and incomplete.
Do you, Or anyone else out there, know whether an actual form or card is fill out by an enlistee back in 1840? As I mentioned earlier, the only thing I was able to find was the enlistment report and that was filled out by a clerk, not the person actually enlisting. The Milan that I found was listed as William. The name on the list previous to his was William as well and there were several Williams on this single list. I am questioning whether the clerk misquoted the name when filling out the report. If there is an enlistment card or something that the enlistee actually singed, that would help me out.
Also, I thought that pay records might help me as well but I have not been able to locate those either. The national records seem to jump from 1812 to the indian wars in the mid 1840's.
Lastly, since my grandfather learned the information from his grandfather directly and it was his father that had died, I feel fairly certain that at least the fact of his death in the Aroostook War is accurate. I did also find a news article about my gggrandfather Thomas being wounded in the Civil War and it identified his father as dying in the Aroostook War but it didn't list his name.