These two former Soviet republics have been at loggerheads for many years over a region called Nagorno-Karabakh. In 2014, thanks to a series of tweets by the President of the one of the countries claiming that a 'state of war' now existed between the two, several media outlets (somewhat outrageously) reported this as the first ever declaration of war over Twitter.
Which two countries are these?
[+ Show Answer]
Azerbaijan and Armenia.
More on this.