Empires collapse all the time and another comes up.  Its just it.You have to look at it as a whole. From the topview of it

NATO is a bloc whether its for defense or offense, it doesn't matter. They prevent nations from oppressing the other. But NATO themselves oppressed members, you take a look at Germany, its been prevented to rise since WW2, they couldn't even develop military capabilities because they were sanctioned also. A whole lots more countries actually.

When US  invite countries for summit recently, they exclude other countries down the south.  What are they doing? We are suppose to be Americas!
If we are going to talk about breakaway regions. Mexico has a lot of land before including Cali up to Colorado. But who does this countries belong now?  This new world is never been the same before Putin.