1815. United States trading post established at Green Bay.
1816. Indian treaty confirming that of 1804.
United States troops took possession of Prairie du Chien, and commenced the erection of Fort Crawford.
Col. Miller commenced the erection of Fort Howard, at Green Bay.
1818. State of Illinois was organized; Wisconsin attached to Michigan.
Brown, Crawford and Michillimackinac counties were organized by the territory of Michigan which embraced in their boundaries, besides other territory, the whole of the present state of Wisconsin.
1820. United States commissioners adjusted land claims at Green Bay.
1822. The New York Indians purchase lands east of Lake Winnebago.
James Johnson obtained from the Indians the right to dig for lead by negro slaves from Kentucky.
1823. January. Counties of Brown, Crawford and Michillimackinac made a separate judicial district by Congress.