Tour of Duty.

The article offers information on 30 memorials and other historical sites and events in Oklahoma that commemorate members of the U.S. Armed Forces. Altus Air Force Base hosts the Biannual Wings of Freedom Open House and Air Show. The Engagement at Honey Springs re-enactment will be held in April 2011 in Checotah to celebrate the 150th anniversary of the Civil War. Fort Supply is described as a fort of supply for U.S. troops waging winter campaigns against the Southern Plain Indians between 1868 and 1894.