William Hexamer commanded an artillery battery in the American Civil War. Hexamer was born in Koblenz, Kingdom of Prussia on April 12, 1825. During the 1848 Revolution he served as an aide to Franz Sigel. Both of them had to go into exile when the revolution failed.[1] By 1861, Hexamer, with the rank of major, was commander of a militia battery called the Hudson County Artillery.[2]