Peter, thanks for your response. I am hoping you can help by explaining to me what unprovoked imperial attacks by Russia specifically triggered the following NATO expansions:

What happened in 1999 to trigger the accession of Czech Republic, Hungary and Poland?

What heinous act did Russia commit in 2004 to cause Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia and Slovenia all to join at the same time?

I would appreciate it if you could provide answers to those questions. Thanks in advance!