G. A. Henty 
Won by the Sword 
A Story of the Thirty Years‘ War

Though he explored many eras in his historical action-adventure novels geared for younger readers, G. A. Henty was particularly interested in the sectarian religious conflicts that gripped Europe in the seventeenth and eighteenth centuries. In Won by the Sword, Hector Campbell, a Scottish war orphan, comes into his own aiding France in its campaign against the Hapsburg empire.