Immediately after ordering the activation of the Territorial Guard, Governor Poindexter began the task of creating it. The University of Hawaii Reserve Officer's Training Corps was activated and assembled at the University of Hawaii campus and immediately drafted into the Territorial Guard, alongside various high school JROTC students.
At 11:00 a.m. on the same day, all members of the American Legion were also called to duty via radio, thus adding between three hundred and four hundred members to the Territorial Guard ranks, whose membership would reach a strength of 89 officers and 1,254 enlisted men by December 31, 1941.