(d) To secure a firm continental base in which to fight a protracted war and to deny the use of the China coast ports to the Allies. Below are discussed the operations which it will be necessary for Japan to undertake to achieve any of these objects and the effect which success in achieving them will have on her overall strategic position. 6. Collapse of China The fall of the Central Government might be brought about either by the collapse of all its armies or by a combination of economic, political and military measures.