The Elm Conflict (Swedish: Almstriden), also known as the Battle of the Elms (Swedish: Slaget om almarna), was a dispute and public protest on 11–12 May 1971. Organised by Alternativ stad (the Stockholm branch of Friends of the Earth), the dispute centred on the planned destruction of 13 Scots elm trees located at the entrance to the Kungsträdgården metro station in Kungsträdgården, Stockholm, Sweden. Under the elms was an outdoor coffee house, popular among the youth at the time.
https://en.wikipedia.org/wiki/Elm_Conflict