2018 Fall Muster at Fort Osage Join us for the 32nd Annual Fall Muster at Fort Osage Historical Landmark on October 27-28, 2018 at Fort Osage Historic Landmark in Sibley, Missouri. Executed with historical accuracy, this annual re-enactment of the Fall Muster at Fort Osage Historical Landmark relives events surrounding the prelude to the War [read more]