The MOFW was patterned after the Military Order of the Loyal Legion of the United States (MOLLUS) which was a military society for officers, and their descendants, who had served the Union during the American Civil War. As MOLLUS had restricted its membership to officers who had served in one particular war, the need was felt to have an organization for the descendants of officers who had served in the American Revolution, War of 1812 and the Mexican War – as well as the few surviving Mexican War veterans who were officers.