Davis Nathan Hosmer was born on April 14, 1845, in Farmington, Massachusetts to Nathan and Rebecca Hosmer. He had four brothers and sisters: Francis, Samuel Haynes, Martha Ann, and Rebecca Jane. Working as a famer, Davis left his family in September 1862, to enlist in Company F of the 45th Massachusetts Volunteer Militia. His regiment was deployed to New Bern, North Carolina, in the fall of 1862, and was engaged in several battles including the Battle of Kinston (December 12, 1862) and the Battle of White Hall (December 16, 1862). Tragically, Davis did not live to see the end of the War as he passed away in a New Bern hospital from typhoid fever on February 10, 1863. After his death, his body was shipped back home to his parents in Massachusetts.