this, a gay movement began to grow in the larger cities, especially in West Berlin, where homosexuality had been widely accepted during the twenties in the Weimar Republic. Anger over the treatment of demonstrators following the death of Benno Ohnesorg and the attack on Rudi Dutschke, coupled with growing frustration over the lack of success in achieving their aims led to growing militance among students and their supporters. In May 1968, three young people set fire to two department stores in Frankfurt; they were brought to trial and made very clear to the court that they regarded their action as a legitimate act in what they described as the "struggle against imperialism". The student movement began to split into different factions, ranging from the unattached liberals to the Maoists and supporters of direct action in every form—the anarchists. Several groups set as their objective the aim of radicalising the industrial workers and taking an example from activities in Italy of the Red Brigades (), many students went to work in the factories, but with little or no success. The most notorious of the underground groups was the Red Army Faction which began by making bank raids to finance their activities and eventually went underground having killed a number of policemen, several bystanders and eventually two prominent West Germans, whom they had taken captive in order to force the release of prisoners sympathetic to their ideas. In the 1990s attacks were still being committed under the name "RAF". The last action took place in 1993 and the group announced it was giving up its activities in 1998. Evidence that the groups had been infiltrated by German Intelligence undercover agents has since emerged, partly through the insistence of the son of one of their prominent victims, the State Counsel Buback. Willy Brandt In the 1969 election, the SPD—headed by Willy Brandt—gained enough votes to form a coalition government with the FDP. Although Chancellor for only just over four years, Willy Brandt was one of the most popular politicians in the whole period. Brandt was a gifted speaker and the growth of the Social Democrats from there on was in no small part due to his personality. Brandt began a policy of rapprochement with West Germany's eastern neighbours, a policy opposed by the CDU. The issue of improving relations with Poland, Czechoslovakia and East Germany made for an increasingly aggressive tone in public