with the new system of organization, the infantry regiment was reorganized as a headquarters with no organic battalions, but with three separate battalions attached. the headquarters was organized into three combat commands that could be dispatched on separate combat actions with units that were attached. one infantry battalion would be assigned to a combat command, with attachments from the higher headquarters reserve. the 100th, however, was not initially attached to a regiment. it came to be knowb unofficially as the "one-puka-puka" (puka means "hole" in hawaiian).