Conversation so far:
What happened at the Menominee reservation?
The reservation was created in a treaty with the U.S. signed on May 12, 1854 in which the Menominee relinquished all claims to the lands they held under previous treaties.

Question: What lands did those include?
Self-contained rewrite: What lands did the Menominee hold under previous treaties before the one signed with the U.S. on May 12, 1854, include?