Good examples and getting at what my point was. External forces (generally capitalist but also the Red Army did its fair share) continually besiege anarchic societies. Without alliances and reaching societal critical mass, anarchic (and other socialist and/or communist) societies are too vulnerable to interference. Rojava (different SDF) has already seen some of this with efforts to undermine their position having already taken place (ex. Trump’s government negotiating some disarmament then abandoning then to Turkish artillery/airstrikes).