The Russia-led security bloc will be sending peacekeeping forces, the first time in its history that its collective security provision has been exercised.
There was much to discuss just over a year after the end of the war, including ongoing border tensions, plans to reopen borders and transportation, and the fate of Armenian prisoners.
Uzbekistan has been discussed as the most likely contender to accept some sort of U.S. military presence, even as Tashkent consistently denies the possibility.