Colorado's state government was decapitated when the Soviet Union destroyed Denver with an atomic bomb on March 2, 1951. It fell to the Federal government to call out the National Guard for the state and to establish a number of refugee camps around the ruins of Denver.
Colorado was badly hit when the Yellowstone Supervolcano erupted due to falling ash.Denver eventually was evacuated but the loss of life was in the hundreds of thousands. Areas further east and south were hanging in but barely.
In the aftermath of the Krolp invasion, Colorado became the center of the rump United States and Canada. Grand Junction became the de facto national capital. When the U.S. launched its failed three day uprising to prevent the Krolp from stripmining for silver and a small amount of gold deep below the surface of northeastern Utah, the center of government was briefly transferred to Craig, Colorado.