Armenia, established as a republic on September 21, 1991, is the smallest of the former Soviet republics, located in the South Caucasus with a population of approximately 3 million. It is notable for being the first nation to adopt Christianity as its state religion in 301 AD, and for having a significant Armenian diaspora largely due to historical migrations and the Armenian genocide. The country is currently engaged in a long-standing 'frozen conflict' with Azerbaijan over the Nagorno-Karabakh region, which has led to a complex geopolitical situation in the area.