Redoubt Volcano, or Mount Redoubt (Dena'ina: Bentuggezh K’enulgheli), is an active stratovolcano in the largely volcanic Aleutian Range of the U.S. state of Alaska.

a political migration movement first proposed in 2011 by survivalist novelist and blogger James Wesley Rawles which designates Idaho, Montana, and Wyoming along with eastern parts of Oregon and Washington, as a safe haven for conservative Christians.

A national redoubt or national fortress is an area to which the (remnant) military forces of a nation can be withdrawn if the main battle has been lost or even earlier if defeat is considered inevitable.

a German field fortification, west of the village of Beaumont Hamel on the Somme.

a tactical incident in the Battle of the Somme, 1916 during the First World War.

The Valtellina Redoubt or, officially, in or RAR, was the intended final stronghold or redoubt of the Italian fascist regime of Benito Mussolini at the end of World War II in Europe.