Utah's association with the U.S. military has not always been particularly comfortable. From the march of Johnston's Army on Utah during the Utah War of 1857-58, to the proliferation of military installations during and after World War II, to the experience of nuclear and chemical/biological Downwinders, Utahns have maintained a complex and ambiguous relationship with the Pentagon. This presentation offers a historical survey of Utah's experience with the U.S. military, with an eye toward the social and environmental impacts of military installations and operations in the state.