The Federal Republic of Chicago, or simply Chicago, is a major nation located in the American Midwest, established following the collapse of the United States government in the aftermath of the Yellowstone Eruption, which disrupted trade, communications, and electricity, and killed millions of civilians through the continental United States and Canada. An emergency government was set up by the city council of Chicago, and the local National Guard units deployed to restore order following the eruption. When order began to disintegrate throughout the rest of the nation, Chicago begin the largest city in the area, established itself as the head of the local metropolitan area, founded the Federal Republic of Chicago.