Just now re-reading #DigOurHeroesOutOfTheTrash I found a thread to pull on and I found out about the Treffen in #TUNIX in #Berlin in #1978, a meeting of German leftists that led to a lot of other organizing afterwards such as the #Green Party.
#Deutsch Wikipedia: https://de.wikipedia.org/wiki/Treffen_in_Tunix

Article on the Berliner Tunix Kongress (source of attached photo) http://einestages.spiegel.de/static/authoralbumbackground/1287/auf_zum_strand_von_tunix.html