On 12 March 1999, the Czech Republic, Hungary, and Poland joined NATO; Bulgaria, Estonia, Latvia, Lithuania, Romania, and Slovakia joined in March 2004; Albania joined on 1 April 2009.
ইস্টার্ন ব্লকের কোন দেশ সম্প্রতি ন্যাটোতে যোগ দিয়েছে?
Albania