In 1940, the American Quarter Horse Association (Aqua) was formed by a group of horsemen and ranchers from the Southwestern United States dedicated to preserving the pedigrees of their ranch horses.
e 1940, iqembu labantu elihlobene namahhashi eningizimu-ntshonalanga ye-United States, kufaka phakathi abalimi nabafuyi, wasungula i-American Quarter Horse Association (AQHA) ukugcina uhlu lozalo lwamahhashi akhe eCowboy Quarter.