Everyone knows that Russia didn't annex Finland during the Second World War. What would happen if they did?
Derived from https://commons.wikimedia.org/wiki/File:Union_of_Soviet_Socialist_Republics_(orthographic_projection).svg by Ssolbergj, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons. Changes made: Added Finland to USSR.