Mandate B. German C. Peace D. Colonial Find an answer to your question What system was put in place after world war 1 to deal with the issue of Germany’s former colonies Mandate B. A. A. The _____ System was put in place after World War I to deal with the issue of Germany's former colonies. The _____ System was put in place after World War I to deal with the issue of Germany's former colonies. The League of Nations was an international diplomatic group developed after World War I as a way to solve disputes between countries before they erupted into Peace C. Colonial D. German - 10062501