The city of Des Moines was originally a frontier fort. Unlike the majority of such in the West in early days, this outpost at the "forks of the Raccoon" was not established to protect the whites from the Indians. On the contrary, Fort Des Moines was founded to guard the Sac and Fox Indians, to secure them in the peaceful possession of their hunting-grounds and to protect them against rapacious land agents, the encroachments of the whites and the bloody Sioux. And the event was typical of the relations of the national Government with the Indian tribes of Iowa. When Iowa became known to the people of the East the tide of emigration soon began to run high and strong toward the Mississippi. It is not extravagant to say that never have more beautiful lands been opened for human settlement than lay beyond the "Father of Waters" in the hunting-grounds of the Sacs and Foxes. "_Une ravissante contrée_" exclaimed in 1842 King Louis Philippe's son, Prince de Joinville, as he gazed upon the gorgeous green of the river bluffs, forests, and valleys, and meadows and prairies of Iowa. The wonderful stories related of the marvellous fertility of the soil and the attractiveness of nature in this Western Mesopotamia gave a tremendous impetus to emigration. But the national Government firmly held back the tide. The Mississippi was patrolled by troops to prevent the settlers invading the lands. Colonel Zachary Taylor and Lieutenant Jefferson Davis, both later to achieve great fame, were among those who guarded the rights of the Iowa Indians and ejected overzealous frontiersmen and "squatters." But the pressure of population westward was irresistible; and small pretexts were sufficient to break down the barriers. The war with the Sacs and Foxes under their great leader, Black Hawk, came on and by the treaty of 1832, known as the "Black Hawk Purchase," negotiated by General Winfield Scott, a tract along the Mississippi fifty miles wide was opened for settlement. This strip was rapidly populated and in 1836 the Keokuk reserve was ceded to the United States. In 1837 a large tract adjacent on the west, aggregating 1,250,000 acres, was purchased from the Indians. In a short time the settlers began to clamor for the opening of the beautiful lands in the Des Moines Valley and beyond, and to petition Congress; and on October 11, 1842, Governor John Chambers, the second Territorial governor of Iowa, negotiated a treaty at Agency City which obtained title to the rest of Iowa. By its terms the Sacs and Foxes were permitted to remain three years in their beloved hunting-grounds before their departure for Kansas. It was the latter provision that led to the establishment of Fort Des Moines.