Following the Civil War, Wisconsin officials reorganized the state militia and in 1879 renamed it the Wisconsin National Guard. Adjutant General Chandler P. Chapman of Madison, a veteran of the Iron Brigade, purchased 440 acres near the Village of Camp Douglas, where rifle practice began in 1888, and soon transferred the land to the state. The original tract was enlarged and became known as the Wisconsin Military Reservation, where National Guard training camps helped Wisconsin troops earn a national reputation for marksmanship and other soldiering skills. Four regiments were rapidly mobilized there at the outbreak of the Spanish-American War in 1898, demonstrating the efficiency of the state's training program, and Guard units also mobilized on the grounds during both World Wars. In 1927 the reservation was renamed Camp Williams in honor of Lt. Col. Charles R. Williams, the camp's quartermaster, who is buried there. Since 1900, hundreds of thousands of Guard members have trained on the installation. In 1957, the state legislature named the portion used by the Air National Guard Volk Field in honor of Lt. Jerome A. Volk, the first Wisconsin fighter pilot killed in action during the Korean Conflict.