Political map of North America & the Caribbean on 29 Dec 1890 (Closing the Frontier: Wounded Knee Massacre), showing the following events: Panama Crisis; Geronimo’s final surrender; Anglo-Venezuelan rupture; Canada (Ontario Boundary) Act; North & South Dakota become US states; Montana becomes US state; Washington becomes US state; Oklahoma Organic Act; Idaho becomes US state; Wyoming becomes US state; Wounded Knee Massacre.