Johann von Ewald (20 March 1744 – 25 June 1813) was a German military officer from Hesse-Kassel. After first serving in the Seven Years' War, he was the commander of the jäger corps of the Hessian Leib Infantry Regiment attached to British forces in the American Revolutionary War. He arrived with his troops, first serving in the Battle of White Plains in October 1776. He saw regular action until his capture at Yorktown in 1781. In 1788, he joined the Danish Army, where he rose to the rank of lieutenant general; he also served as governor general of Holstein during the Napoleonic Wars. Following his American war experiences, he wrote an Essay on Partisan Warfare (German: Über den kleinen Krieg), a widely read treatise on guerrilla warfare. He also kept a journal during most of his time in N