When Lynn Harold Harriman was born on May 8, 1892, his father, Daniel, was 44 and his mother, Nellie, was 25. He married Anna "Annie" May Johnson on March 9, 1914, in Bradford, New Hampshire. They had one child during their marriage. He served in the U.S. Army during World War I as a Second Lieutenant in the 101st Infantry Regiment, 26th Infantry "Yankee" Division. He died on May 31, 1918 in France at the age of 26 and is now buried in Coal Hearth Cemetery, Warner, Merrimack County, New Hampshire, USA.

Distinguished Service Cross
While serving with 101st Infantry Regiment, 26th Division, A.E.F., in the Humbert Plantation, France, 27 May 1918, while in command of his platoon.
Second Lieutenant Harriman was viciously attacked by the enemy in greatly superior numbers. He led his men with determination and great courage, and himself stopped their advance in a side trench.
He was mortally wounded but continued to fight on, calling upon and encouraging his men and participating with them in driving the enemy off.