 From its creation in 1939 to 1972, Quezon City was represented as part of Rizal Province, with the western areas that formerly belonged to Caloocan, Mandaluyong, and San Juan voting as part of that province's first district, and the eastern areas that formerly belonged to Marikina, Montalban (now Rodriguez), Pasig, and San Mateo voting in the second district.In the disruption caused by the Second World War, Quezon City was incorporated into the City of Greater Manila on January 1, 1942 by virtue of Manuel Quezon's Executive Order No.400 as a wartime emergency measure.