evidence: The issue of exclaves/enclaves is another border-related issue; there is an exclave called Artsvashen which is formally part of Soviet-era Armenia but controlled by and situated entirely within the current Republic of Azerbaijan; likewise, there are 4 Azerbaijani exclave villages of Karki, Yukhari Askipara, Barxudarlı and Sofulu that were formally part of Soviet-era Azerbaijan but are controlled by and situated entirely within the current Republic of Armenia.[87] [...] Nikolay Bordyuzha, the former longtime secretary general of the CSTO said "the issue is Armenian territory, the ownership of which is not under question," adding that "the entire international community sees this territory as the sovereign territory of Armenia. According to its own documents, the CSTO is obliged to react in the case of an incursion by the armed forces of another state."[387][156] Neil Hauer, a journalist specializing in the Caucasus points out that Azerbaijan's September 2022 invasion of Armenia occurred only a few days after Russia's forces experienced military setbacks in Ukraine's Kharkiv region and the "CSTO was exposed as a paper tiger."[223] [...] The blockade [of Nagorno-Karabakh/Artsakh] is, therefore, not an isolated act but one occurring in the context of a war...that Azerbaijan unilaterally began in September 2020 and that has as its aim the takeover of historic Armenian lands in the Republic of Artsakh and in the Republic of Armenia along with the forced displacement ("ethnic cleansing") of the Armenian populations in Azeri-acquired territory.