In the 1860 census, both Lorenzo and his brother Henry were living in Lawrence, MA, working as laborers. They soon went back home to Turner, as Lorenzo enlisted from there on 29 Sept 1862, to serve in Co D, 23rd Maine Infantry. He was mustered in the same day, aged 25, as a private (later promoted to corporal), and served until 15 Jul 1863, when the nine-month regiment was disbanded. He afterwards returned to Lawrence, and reenlisted with the 6th Massachusetts Infantry, Co K, on 11 Jul 1864. Mustered in as a sergeant on 14 July '64, he was mustered out on 27 Oct 1864.

He was a farmer back in Turner for the 1870 census, living together with his brother Henry and his family. Henry was a "canvasser for fruit trees", an occupation Lorenzo took with him when he returned to Mass.

Lorenzo was living in Newburyport by 1877, where he was a seller of fruit and ornamental trees [street directories]. Following the death of his wife, he moved to Boston and sold real estate.

In the book LEAVITT Descendants of John Leavitt, the Immigrant, Through His Son, Israel and Lydia Jackson (pg 46), it is noted that this couple had no issue that lived. They had at least one child:

i. HENRY BROOKINGS LEAVITT, born 28 Sept 1876 in Newburyport, MA. He died 1 Jan 1877 in Newburyport [MA vr vol 292 pg 244].

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​The Colby College website has a photo of Arch D Leavitt: 
http://lgimages.s3.amazonaws.com/data/imagemanager/18248/arch_leavitt.jpg

Arch was a graduate of Colby College, Waterville, Class of 1862. His fellow fraternal brothers in Delta Kappa Epsilon, upon hearing of his death, had the following "Tribute of Respect" printed in the Portland Daily Press, on 30 June, 1864 (pg 3).