[2] Long attended the district schools of his native town, and worked on the farm, until he was 13 years old.
[3][2] At the age of 20 he finished his preparatory course, but when the American Civil War broke out, he abandoned his educational plans to join the military.
[3][2][1] On August 12, 1861, Long enlisted as a private in company A, 8th Michigan Volunteer Infantry Regiment.
He went to the front with his company and regiment, and served in the various engagements in which they took part until the Battle of Wilmington Island, Georgia, on April 16, 1862.
He was elected prosecuting attorney of the Genesee County in the fall of 1874, and was re-elected in 1876 and 1878, holding the office for six years.