The Ultimatum of the Federation of Disparu to the Great Lakes Provinces is the name of the ultimatum formally issued by Disparu to the Great Lakes Provinces on 15 October 2011, during the war against the Great Lakes Provinces, in an attempt to bring the war to an end, prevent future provocations by the Great Lakes Provinces, and convict those who committed war crimes. The ultimatum was carried into the talks inside an ornate Plexiglas box. The original ultimatum, along with its box, is currently on display at the Disparuean Archives.