Also, between the Pacific Ocean and the coast range which forms the eastern boundary of the plain is a longer, narrower, and very sparsely populated strip, or east wing, divided also into two provinces, Principe on the north and Infanta on the south, each supposed to contain about fifteen thousand people. Principe and Infanta are wholly unimportant, except that, to avoid confusion, we must account for all the provinces visible on the maps of Luzon. These two provinces never gave any trouble and no one ever bothered about them. [285] In the mountains of Zambales and Bataan, however, as in most of the other provinces of the archipelago, the struggle was long kept up, just as the Boers kept up their war for independence against Great Britain about the same time, by guerrilla warfare. The central plain with five provinces has already been fully described. If to this plain you add its two wings, above mentioned, you have the nine provinces of central Luzon you see on the map. And if to them you add the six provinces of the Ilocos country and the three of the Cagayan valley, you have clearly before you the political make-up of northern Luzon--eighteen provinces in all. When central Luzon was arranged by districts under the military occupation, it was divided into three parts, the Third, Fourth, and Fifth districts of the Department of Northern Luzon, the Third District being under General Jacob H. Smith of Samar fame, [286] the Fourth under General Funston, and the Fifth under General Grant. The Sixth and last district of northern Luzon was made up of the city of Manila and adjacent territory. General Smith's district, the Third, comprised the provinces of Province Area (sq. m.) Population Zambales 2,125 104,549 Pangasinan 1,193 397,902 Tarlac 1,205 135,107 ----- ------- 4,523 637,558 Pangasinan with its near 400,000 people is the largest, in point of population, of the twenty-five provinces of Luzon, and the third largest of the archipelago. General Funston's district, the Fourth, comprised the provinces of Province Area (sq. m.) Population Nueva Ecija 2,169 134,147 Principe [287] 331 15,853 ----- ------- 2,500 150,000 General Grant's district, the Fifth, comprised the provinces of Province Area (sq. m.) Population Bataan 537 46,787 Pampanga 868 223,754 Bulacan 1,173 223,742 ----- ------- 2,578 494,283