The Puerto Rico State Guard (PRSG) —Spanish: Guardia Estatal de Puerto Rico— is the state defense force of Puerto Rico that operates under the sole authority of the governor of Puerto Rico who, in turn, delegates such authority to the Puerto Rico Adjutant General. The Guard's secondary purpose is to assume the state mission of the Puerto Rico National Guard in the event that the National Guard is mobilized. The first incarnation of the PRSG was created in 1941 in response to World War II and it disbanded in 1946. The PRSG is one of the few state defense forces of the United States that has an air division.