 The first group of 20,000 men was called up on January 1, 1937; and by the end of 1939 there were 4,800 officers and 104,000 men in the reserves.Infantry training was given at camps scattered throughout the Philippines; field artillery training was concentrated in the vicinity of the U.S. Army's Fort Stotsenburg near Angeles, about fifty miles north of Manila, and specialized training was given at Fort William McKinley just south of Manila.Coast artillery instruction was carried on at Fort Stotsenburg and at Grande Island in Subic Bay by personnel supplied largely by the American commander at Corregidor.