Those who want to see the Caucasus as a tidy geopolitical chessboard will be disappointed.

Despite evident Russian displeasure, Armenian president Serzh Sargsyan, decided to attend last week's NATO summit in Wales.

Armenia used to have a foreign policy strategy it called "complementarity," balancing between Russia, the West and Iran. Nowadays, the vector is strongly with Russia. On September 3 last year- a date that Armenians now use as a shorthand to mark a momentous shift in its strategic direction - Sargsyan committed his country to joining Vladimir Putin's Eurasian Union. In March, Armenia was one of the handful of nations which supported Russia at the United Nations over Crimea.

Despite this, the husk of complementarity survives. In Wales, Armenia was listed alongside Azerbaijan, Georgia, and Moldova in the NATO communique as a country whose "territorial integrity, independence, and sovereignty" the alliance supports.

That was in part a gesture of gratitude to Sargsyan for his courage in making the trip and also the strong element in the Armenian armed forces, led by deputy defense minister David Tonoyan, which collaborates well with NATO.

Russia is trying to increase its influence in Armenia in multiple ways. Recently an initiative was announced to open a branch of Moscow State University in Yerevan.

But there is a lot of mistrust between the two sides. Armenians are angry with Russia for selling weapons to its enemy, Azerbaijan. And everyone recalls that in the summer of 2013, Sargsyan was discussing the final details of a far-reaching Association Agreement with the European Union, when he made a sharp U-turn and announced he had chosen to go in a totally different direction - towards the Eurasian Union.

Now pro-European Armenians are looking to a couple of unlikely potential saviors to help them out: Kazakhstan's president Nursultan Nazarbayev and Belarussian leader Alexander Lukashenko. Neither has hidden their lack of enthusiasm at Armenia's efforts to become the fourth member of their economic union project. After Armenia secured exemptions for 800 products from the higher duties of the Customs Union, Lukashenko expressed displeasure at “any special terms or statuses” being granted to new members.

But even if the Eurasian Union project comes apart under its own contradictions, Armenia has still lost a lot of ground with Brussels. A year on, serious discussions between the European Union and Yerevan on how to re-launch the relationship have yet to start.

Thomas de Waal is a senior associate at the Carnegie Endowment for International Peace. This commentary was written for Carnegie Moscow Center.