Catalonia. Brexit. Kurdistan. Tibet. Scotland. Luhansk and Donetsk. Quebec. These places have significant minorities that want to leave the country they are currently in and set up their own. They want to secede. The reasons for secession are varied, as are the methods of seceding. There are arguments for and against secession, and you can find secessionist sentiments in all of the major and minor political ideologies out there. Here are 10 of the most successful secessions of the past 250 years or so: 1. The 13 American colonies leaving the United Kingdom: Was the American Revolution an act of secession or an act of patriots defeating a foreign imperial power?