The problem was what turned out to be the last of the Indian fighting, involving a long-drawn-out campaign. For over a hundred years, as every one knows, the unequal struggle of two races for this continent had been in progress and the history of it is the ever tragic story of the survival of the fittest. No one can read it without regret at the destruction, the extermination, of a race. No one, however, can for a moment hesitate in his judgment of the inevitableness of it, since it is and always will be the truth that the man or the race or the nation which cannot keep up with the times must go under--and should go under. Education, brains, genius, organization, ability, imagination, vision--whatever it may be called or by how many names--will forever destroy and push out ignorance, incompetence, stupidity. The Indians were not able--tragic as the truth {26} is--to move onward, and so they had to move out and give place to the more worthy tenant. The end of this century of struggle was the campaign against the Apaches in the Southwest along the Mexican border, where they made their last stand under their able leader Geronimo. The young doctor was detailed at once for duty on a broiling fourth of July under Captain--afterwards General--Henry W. Lawton, and the next day he rode a horse over thirty-five miles. That incident to the initiated is noteworthy, but even more so is the fact that shortly afterwards in a hard drive of five succeeding days he averaged eighteen hours a day either in the saddle or on foot, leading the horses. It was a stiff test. To make it worse he was given the one unassigned horse--that is to say, a horse that was known as an "outlaw"--whose jerky gait made each saddle-sore complain at every step. The sun beat down fiercely; but, burned and blistered fore and aft, Leonard Wood could still smile and ask for more action. The stoicism of the tenderfoot who had come to play their game was not lost on the troopers {27} with whom he was to spend the next two years fighting Indians. He "healed in the saddle" at once and a few weeks later was out-riding and out-marching the best of Captain Lawton's command, all of whom were old and experienced Indian fighters.