In OTL, there is 28 member states of the European Union, with Croatia being the newest member having joined on the First of July, 2013. But, in the past, Norway was trying to apply but it didn't pass because they rejected, and Greenland left it after they had more home-rule. And also, the other (mostly eastern) European nations either showed no interest of ever joining, or they are more concentrated on Russia, or they have a long way to go to improve their country. (This is a open time-line. Feel free to change anything that would seem wrong on the time-line)