In 1678, the Puritan minister Samuel Nowell preached a sermon he called "Abraham in Arms," in which he urged his listeners to remember that "Hence it is no wayes unbecoming a Christian to learn to be a Souldier." The title of Nowell's sermon was well chosen. Abraham of the Old Testament resonated deeply with New England men, as he embodied the ideal of the householder-patriarch, at once obedient to God and the unquestioned leader of his family...