The Rocky Mountains (or Rockies) are a major mountain range in western North America. The Rockies stretch more than 2,980 miles from the northernmost part of British Columbia, in western Canada, to New Mexico, in the southwestern United States. The range's highest peak is Mount Elbert located in Colorado at 14,440 feet sea level.
Currently, much of the mountain range is protected by parks, and is a popular tourist destination, especially for skiing and snowboarding.
Shortly after the Krolp attacked Earth, Canada and the United States merged in order to pool resources against their alien foe. It didn't do either much good. Within a few years, both Canada and the US were reduced to a rump state along the Rocky Mountains along with the Wasatch Range. The U.S. President also doubled as Prime Minister of Canada, and these became hereditary offices.
Fifty years after the Krolp dominated most of North America, Canada and the U.S. were completely defeated once and for all after a three day uprising.