Sentence:  bursting from the lips of a charging cavalry trooper was the last sound heard on this earth by untold <WSD>numbers</WSD> of Cheyennes , Sioux and Apaches , Mexican banditos under Pancho Villa , Japanese in the South Pacific , and Chinese and North Korean Communists in Korea . 
Meaning of the word marked with <WSD> tags:  the property possessed by a sum or total or indefinite quantity of units or individuals