The Fox and Sauk Indians were allies that started their settlements along the Saint Lawrence River. They made an alliance and fought together to keep settlers from moving west onto their lands and forcing them to move west.
The Reason for War
All Native Americans living east of the Mississippi River were forced to move to Indian Territory after Congress passed the Indian Removal Act. Many tribes, including the Fox-Sauk Indians, didn't want to leave their lands.
The Black Hawk War
The fighting starting in May of 1832 after the tribes crossed the Mississippi River. The US sent a militia. The tribe was eventually defeated, and they had to leave Illinois.
The Aftermath
After the Fox-Sauk Indians were defeated and forced to leave, Indian removal increased, causing many tribes to move to Indian territory in present - day Oklahoma.
Pictures - https://upload.wikimedia.org/wikipedia/commons/c/c4/Sauk_Indian_family_by_Frank_Rinehart_1899.jpg
https://upload.wikimedia.org/wikipedia/commons/1/16/Trails_of_Tears_en.png
https://upload.wikimedia.org/wikipedia/commons/4/4a/Map_of_Illinois_blue.svg
https://upload.wikimedia.org/wikipedia/commons/4/45/Okterritory.png