groups of followers had already assumed a more permanent character, forming a standing center organized during peace, around which the other volunteers gathered in case of war. Such war columns were rarely strong in numbers. The most important expeditions of the Indians, even for long distances, were undertaken by insignificant forces. If more than one group joined for a great expedition, every group obeyed its own leader. The uniformity of the campaign plan was secured as well as possible by a council of these leaders. This is the mode of warfare among the Allemani in the fourth century on the Upper Rhine, as described by Ammianus Marcellinus.
7. In some tribes we find a head chief, whose power, however, is limited. He is one of the sachems who has to take provisional measures in cases requiring immediate action, until the council can assemble and decide. He represents a feeble, but generally undeveloped prototype of an official with executive power. The latter, as we shall see, developed in most cases out of the highest war chief.
The great majority of American Indians did not go beyond the league of tribes. With a few tribes of small membership, separated by wide boundary tracts, weakened by unceasing warfare, they occupied an immense territory. Leagues were now and then formed by kindred tribes as the result of momentary necessity and dissolved again under more favorable conditions. But in certain districts, tribes of the same kin had again found their way out of disbandment into permanent federations, making the first step towards the formation of nations. In the United States we find the highest form of such a league among the Iroquois. Emigrating from their settlements west of the Mississippi, where they probably formed a branch of the great Dakota family, they settled at last after long wanderings in the
