Michael P. Fenton also known as Sergt Dan A. Sullivan

This article is from the June 26, 1918 Lowell Sun:

"Sergt. Dan Sullivan of the 82d Company of Marines was Killed in Action
The first Lowell man in the United States Marine service to  give up his life in the present war is Sergt. Dan A. Sullivan of the 82d Company of Marines. He formerly lived at 230 Fayette street, this city.
His sister, Mrs. John P. Killeen of the same address, received word of her brother's death in a telegram from the war department last evening.  The report was verified in today's official casualty list.
Sergt. Sullivan was killed in action, according to the official notification received.here. It is probable that he took part in the recent big offensive of the marines and was one of those who went over the top for the last time. Mrs. Killeen received a letter from him on April 26. Although it vas very brief, he said that he was in good health.
Sergt. Sullivan was 36 years old. He had served one enlistment of four years in the marine service before the war and later worked in the U. S. Cartridge Co. plant, of this city. About a year ago he re-enlisted in the marines and went overseas last October.
Besides his sister he leaves a. brother William, of New York.
Sergt. Sullivan's real name is Michael P. Fenton, although he has been known as Sullivan."

The ironic thing is that he was known in the service as Sullivan but the square in Lowell named in his honor is the Michael P. Fenton square.  The square is at the intersection of East Merrimack and High streets.  He is buried in France as Daniel Sullivan.