You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
Your challenge is to create a world where the USA collapses into 10 or more nations. The POD has to be prior to 1900, however, this doesn't mean that the USA has to collapse before then. Also, no Articles of Confederation related timelines, those are a bit overused!
Hopefully I did this right, I've never done a challenge before.