evidence: That, however, does not mean that Armenia (at least in the near future) will officially leave the Russian–led military bloc, whose other members are Belarus, Kazakhstan, Kyrgyzstan, and Tajikistan. If Azerbaijan eventually invades southern Armenia—aiming to capture the strategically important Syunik province and create a land corridor to its Nakhchivan exclave, and further to Turkey—Yerevan will likely ask CSTO to intervene. But given that the military bloc has a history of ignoring Armenia’s calls, and that it never reacted to Ukraine’s frequent attacks on Russian territory, it is not very probable that the CSTO will protect Armenia against an Azerbaijani incursion. Such a development could lead to Yerevan’s formal withdrawal from the bloc. [...] As a clear winner of the Second Karabakh War, Azerbaijan expects Armenia to fully implement the Moscow–brokered 2020 ceasefire agreement and build its section of the Nakhchivan corridor (also known as the Zangezur corridor) through the Syunik province. Baku insists that cargo, citizens and vehicles going from mainland Azerbaijan to Nakhchivan "should pass through the Zangezur corridor freely without undergoing any inspection and customs clearance." Moreover, Azerbaijan expects Armenia to change its own constitution and get rid of the current preamble that "contains direct calls for the unification of Karabakh with Armenia."