What does "from the errors of other nations, let us learn wisdom," mean

It means that we should pay attention other countries decision making and results, in order to make better decision in our Nation. Learning from other is a better philosophy because makes us more experimented and wise.

Ohio,Indiana, Illinois, and Michigan owe their statehood partly to the 1795 treaty of Greenville,in which native Americans ceded land in what is now those states to Americans settlement.

Explanation: Sorry if this is not what you want I was thinking to give you this, hope this help