sentences:  After beginning as four units, the PRANG expanded to 11 units by the 1980s, including the 1956th Tactics Combat Group, the 140th Radar Squadron and others.As commonwealth militia units, the units in the Puerto Rico Air National Guard are not in the normal United States Air Force chain of command.They are under the jurisdiction of the Governor of Puerto Rico though the office of the Puerto Rico Adjutant General unless they are federalized by order of the President of the United States.