Before Black Hawk's War occurred, the great peace treaty of Prairie du Chien had been followed, in 1830, by a second treaty at the same place, at which Governor Clark and Colonel Morgan reënforced the guarantees of peace. The Omaha tribe now agreed to stay west of the Missouri, its neighbors being the Yankton Sioux above, and the Oto and Missouri below; a half-breed tract was reserved between the Great and Little Nemahas, while the neutral line across Iowa became a neutral strip forty miles wide from the Mississippi River to the Des Moines. Chronic warfare between the Sioux and Sauk and Foxes had threatened the extinction of the latter as well as the peace of the frontier, so now each tribe surrendered twenty miles of its land along the neutral line. Had the latter tribes been willing to stay beyond the Mississippi, where they had agreed to remain, and where they had clear and recognized title to their lands, the war of 1832 might have been avoided. But they continued to occupy a part of Illinois, and when squatters jumped their cornfields near Rock Island, the pacific counsels of old Keokuk were less acceptable than the warlike promises of the able brave Black Hawk. The resulting war, fought over the country between the Rock and Wisconsin rivers, threw the frontier into a state of panic out of all proportion to the danger threatening. Volunteers of Illinois and Michigan, and regulars from eastern posts under General Winfield Scott, produced a peace after a campaign of doubtful triumph. Near Fort Armstrong, on Rock Island, a new territorial arrangement was agreed upon. As the price of their resistance, the Sauk and Foxes, who were already located west of the Mississippi, between Missouri and the Neutral Strip, surrendered to the United States a belt of land some forty miles wide along the west bank of the Mississippi, thus putting a buffer between themselves and Illinois and making way for Iowa. The Winnebago consented, about this time, to move west of the Mississippi and occupy a portion of the Neutral Strip.