Christian Democratic Union of Germany The SPD quickly gained popularity and succeeded in forming a social-liberal coalition with the FDP following the 1969 federal election, forcing the CDU out of power for the first time in their history. The CDU continued its role as opposition until 1982, when the FDP's withdrawal from the coalition with the SPD allowed the CDU to regain power. CDU Chairman Helmut Kohl became the new Chancellor of West Germany and his CDU–FDP coalition was confirmed in the 1983 federal election. Public support for the coalition's work in the process of German reunification was reiterated in the 1990 federal election in
Germany–United Kingdom relations Britain secretly assured Poland of its acceptance of the latter's western boundary. West Germany had been ambiguous about the matter. Britain had long been uneasy with West Germany's insistence on the provisional nature of the boundary. On the other hand, it was kept secret so as not to antagonise Britain's key ally in its quest to enter the European Community. In 1970, West German government under the Chancellor Willy Brandt, the former mayor of West Berlin, signed a treaty with Poland recognizing and guaranteeing the borders of Poland. In 1990, United Kingdom prime minister Margaret Thatcher at first opposed German