In 1885 France and Germany brought all the European powers with interests in Africa together at the Berlin Conference. Its principal objective was to rationalize what became known as the European scramble for colonies in Africa. Prince Otto von Bismarck also wanted a greater role in Africa for Germany, which he thought he could achieve in part by fostering competition between France and Britain. The agreement signed by all participants in 1885 stipulated that on the African coastline only European annexations or spheres of influence that involved effective occupation by Europeans would be recognized. Another agreement in 1890 extended this rule to the interior of Africa and set off a scramble for territory, primarily by France, Britain, Portugal, and Belgium.