The American Chiropractic Association (ACA) as it is known today was formed by a series of amalgamations. Starting with the Universal Chiropractic Association (UCA) of 1906 and the original American Chiropractic Association (ACA) of 1922, the two associations merged to form the National Chiropractic Association (NCA) in 1930. This Association merged with the New American Chiropractic Association (ACA) formed by non-NCA Association members and a splinter group from the International Chiropractors Association (ICA) in 1963. The total merger including all of NCA's assets, facilities, resources, personnel and membership was completed by 1964.
