Another thing we keep forgetting is that an irregular insurgent force with a strong motivation can frequently harass and ultimately defeat a better equipped regular army that lacks motivation. In our own revolution, the forces that harassed the British and Hessian units were frequently little more then untrained volunteers. In the words of Nathanael Greene, "We fight, get beat, rise, and fight again." In the wars against America's original inhabitants, the Battle of Little Big Horn showed the folly of underestimating irregular opponents. More recently, in the Iraq war, regular Iraqi units often surrendered en masse, but the irregulars, known as "Feyadeen Saddam," gave us trouble and casualties. Currently the reconstituted regular Iraqi army still tends to not show up, but the irregular Kurdish force known as Peshmerga has proven to be the most reliable opponent of the ISIS forces.