At the same time, a communique was sent out to supporters from the rest of Europe calling on them to come to Copenhagen and help defend the house. The communique was called "Troublemakers of the world unite!". Ungdomshuset had experienced a lot of foreign support from squatters and left wing radicals across Europe, and a lot of those now prepared to come to Copenhagen to participate in the demonstration. The demonstration was meant to mark the end of the three days of action. The day before on 15 December, thousands of people had marched peacefully through downtown Copenhagen and the protests had been peaceful up until then.