It may be asked, What had the Indians done to make this incursion necessary? They had been guilty of numerous thefts and murders during the preceding summer and fall, for none of which had they been called to account. They had attacked the stations of the overland mail route, killed the employees, burned the station, and captured the stock. Citizens had been murdered in their homes on the frontier of Kansas; murders had been committed on the Arkansas route. The principal perpetrators of these acts were the Cheyennes and Sioux. The agent of the former, if not a party to the murder on the Arkansas, knew who the guilty persons were, yet took no steps to bring the murderers to punishment. Such a course would have interfered with his trade and profits. It was not to punish for these sins of the past that the expedition was set on foot, but rather by its imposing appearance and its early presence in the Indian country to check or intimidate the Indians from a repetition of their late conduct. This was deemed particularly necessary from the fact that the various tribes from which we had greatest cause to anticipate trouble had during the winter, through their leading chiefs and warriors, threatened that as soon as the grass was up in spring a combined outbreak would take place along our entire frontier, and especially against the main routes of travel. To assemble the tribes for the desired council, word was sent early in March to the agents of those tribes whom it was desirable to meet. The agents sent runners to the villages inviting them to meet us at some point near the Arkansas river. General Hancock, with the artillery and six companies of infantry, reached Fort Riley, Kansas, from Fort Leavenworth by rail the last week in March; here he was joined by four companies of the Seventh Cavalry and an additional company of the Thirty-seventh Infantry. It was at this point that I joined the expedition. And as a very fair sample of the laurels which military men may win in an Indian campaign by a zealous discharge of what they deem their duty, I will here state, in parenthesis, that after engaging in the expedition, some of the events of which I am about to relate, and undergoing fatigue, privations, and dangers equal to those of a campaign during the Rebellion, I found myself at the termination of the campaign again at Fort Riley _in arrest_. This is not mentioned in a fault-finding spirit. I have no fault to find. It is said that blessings sometimes come in disguise. Such proved to be true in this instance, although I must say the disguise for some little time was most perfect.