Custer's active service did not close with the war. He was sent to Texas as commander of a cavalry division, and in November, 1865, was made chief of cavalry. In February, 1866, he was mustered out of service as major-general of volunteers and became again captain in the regular army, "on leave." President Johnson denied him the leave of absence he asked for to fight under Juarez in Mexico against Maximilian, the usurper, and in July, 1866, he received his commission as lieutenant-colonel of the newly formed Seventh Cavalry, United States Army--the regiment that he made into Indian fighters and served with until the end. In November, 1866, he joined his regiment at Fort Riley, and was soon fighting Indians on the plains. He utterly defeated the hostile Cheyennes, Arapahoes, and Kiowas at the battle of the Washita, in the Indian Territory, in November, 1871; he was on post duty in Kentucky until 1873, and then again on the plains, where, on August 4, 1873, he whipped the hostile Sioux at the battle of Tongue River, in the Yellowstone country, and again, on the 11th of the same month, at the battle of the Big Horn. In the summer of 1874 he led an expedition of exploration and discovery into the Black Hills, in the Dakota country, and in May, 1876, led his regiment in what proved to be his last campaign, a march against the hostile Sioux in the unexplored region of the Little Big Horn. Here, with less than three hundred men, he faced the confederated Sioux, numbering thousands of warriors, and in a desperate and characteristic engagement closed the record of a life of brilliant effort and daring by standing at bay, against the tremendous odds of ten to one, until he and his entire command fell to a man, fighting desperately to the end.