The years 1906–1910 were a period of crisis and unstable consensus in German colonial history. In contrast to the debates of the previous two decades following Chancellor Otto von Bismarck's 1884 decision to establish overseas protectorates, colonial discourse in Germany after 1905 shifted decisively away from abstract considerations of the desirability of colonies for economic and imperialist expansion to focus on the more practical matters of colonial policy and long-term developmental reform. Indeed, given the fact that by 1905 the German colonial empire covered a sprawling expanse of land six times the size of the German state, including territories in Africa, the South Pacific, and a naval base (Tsingtao) on the coast of China, the enormous challenges of managing its far-flung and costly possessions were becoming increasingly difficult to meet. For better or for worse, the Kaiserreich had become a de facto colonial power, and German society was increasingly and uncomfortably being forced to recognize the hazards and burdens of its fledgling global empire.