For twenty-three years the Department of the Interior continued to call upon the War Department for assistance in administering Yosemite National Park. Eighteen army officers took their turn at the helm. Some of them assumed leadership after some years of Yosemite experience as subordinate officers. Others were placed in command with no previous service in the park. Lieutenant (later Colonel) Harry C. Benson and Major W. W. Forsyth were perhaps the most distinguished of the superintendents. Benson was certainly more than a superintendent; he was an explorer, map maker, trail builder, fish planter, and nemesis of the sheepmen. Among the subordinate officers and enlisted men a number left their mark by way of accomplishments. N. F. McClure and Milton F. Davis are remembered for their explorations and excellent map making. William F. Breeze and W. R. Smedberg worked with McClure and Benson in stocking the headwaters of the Yosemite rivers with trout. A. Arndt pioneered in exploration of some of the northern sections of the park. Many others in the military organizations are remembered in place names throughout the Yosemite High Sierra. Yosemite was fortunate in having within its National Park Service personnel one man, Gabriel Sovulewski,[21] who pioneered with these army units and who was acting superintendent of the park in 1908-1909 and again in 1914. For thirty-five years Mr. Sovulewski was actively engaged in caring for Yosemite. An unpublished manuscript on his National Park Service experiences is preserved in the Yosemite Museum. Within it he comments upon the Yosemite work of United States troops. National Parks in California, and Yosemite especially, owe much to the late Colonel H. C. Benson. No one who has not participated in those strenuous years of hard riding and incessant fighting of natural and human obstacles can ever realize the need for indomitable spirit and unselfish devotion to a cause that existed during those first years in Yosemite National Park. Sheep and cattle overran the country. They were owned by men who knew every foot of the terrain. We were ordered to eliminate them. There were few or no trails, and maps did not exist. Reliable guides were unobtainable, and we had more than a thousand square miles to cover.