In 1884, german chancellor bismarck called a conference in berlin and required that all european powers take what approach to africa?

He  berlin conference  of  1884–85, also  known as  the congo  conference  (german: kongokonferenz) or west  africa  before the  conference,  european  diplomacy treated  african  indigenous people in the same under support from the british and the initiative of portugal,  otto von bismarck,  germanchancellor,  called  on  ..