Abkhazia, Artsakh (also known as the Nagorno Karabakh Republic), Transnistria, and South Ossetia are post-Soviet "frozen conflict" zones. These four states maintain friendly relations with each other and form the Community for Democracy and Rights of Nations. Russia and Nicaragua officially recognised Abkhazia after the Russo-Georgian War. Venezuela recognised Abkhazia in September 2009. In December 2009, Nauru recognised Abkhazia, reportedly in return for $50 million in humanitarian aid from Russia. The unrecognised republic of Transnistria and the partially recognised republic of South Ossetia have recognised Abkhazia since 2006. Abkhazia is also a member of the Unrepresented Nations and Peoples Organization (UNPO).