. . . . . . . . . "XXI" . "1917" . . . . . . . "XXIst Corps" . . . . "XXI Indian Corps" . "XXI British Corps" . . . "XXI Corps (United Kingdom)" . "XXI Corps" . . "XXI Corps (United Kingdom)" . . . "corps" . "21st Corps" . . . . . . . "1919" . . . .