Their dissatisfaction with the treaties signed in 1795 and 1804 caused them to espouse the British cause in the War of 1812, and in 1812 they captured Fort Dearborn on the present site of Chicago, and massacred many of the prisoners.
In 1907 19 springs were reported at which mineral waters were bottled and sold; they were in Allen, Hendricks, Pike, Bartholomew, Warren, Clark, Martin, Brown, Gibson, Wayne, Orange, Vigo and Dearborn counties.
On the 16th of August 1812, without any resistance and without consulting his officers, he surrendered the city to General Brock, for reasons of humanity, and afterwards attempted to justify himself by criticism of the War Department in general and in particular of General Henry Dearborn's armistice with Prevost, which had not included in its terms Hull, whom Dearborn had been sent out to reinforce.'
Milwaukee was on the direct route of travel between Fort Dearborn (Chicago) and the flourishing settlement at Green Bay, and at once after the treaties between the United States and the Menominee in 1831 and 1833 for the extinguishing of the Indian titles, settlers began to come to the neighbourhood.
Brock now promptly transferred himself to the western end of Erie, where the American general Henry Dearborn was attempting another invasion.
General Dearborn captured it at the head of a force of upwards of 2000.