I lived in Korea and never once heard about the Korean People’s Association in Manchuria, an autonomous anarchist zone of 2 million people that only disintegrated because they were consistently attacked by China from the North and Japan from the South. This was in 1929. Moneyless, classless, stateless, gift economy based on mutual aid. It was all there. Further reading at Wikipedia (and their sources!): https://en.m.wikipedia.org/wiki/Korean_People%27s_Association_in_Manchuria
@vulcao the cynic in me says that an anarchistic society disintegrated because they couldn't maintain strong enough levels of self-defense...is not necessarily a shining example of anarchism (even if certain aspects of that society sound admirable).