As to the second point, the solid occupation of the Upper Danube by the Franco-Bavarians was indeed fully accomplished. The imperial forces were defeated upon the bank of that river at Hochstadt, but the advance upon Vienna failed, for the second half of the plan, the march from Northern Italy upon Austria, through the Tyrol, had come to nothing, through the defection of Savoy. The turning of the scale against Louis by the action of England was beginning to have its effect; Portugal had already joined the coalition, and now Savoy had refused to continue her help of the Bourbons. The year 1704 opened, therefore, with this double situation: to the south Austria had been saved for the moment, but was open to immediate attack in the campaign to come; meanwhile, the French had proved so solidly seated in the Spanish Netherlands (or Belgium) that repeated attacks on them in this quarter would in all probability prove barren. It was under these circumstances that Eugene of Savoy came to the great decision which marked the year of Blenheim. He determined that it was best--if he could persuade his colleagues--to carry the war into that territory which was particularly menaced. He conceived the plan of marching a great force from the Netherlands right down to the field of the Upper Danube. There could be checked the proposed march upon the heart of the coalition, which was Vienna. There, if fortune served the allies, they would by victory make all further chance of marching a Franco-Bavarian force down the Danube impossible; meanwhile, and at any rate, the new step would alarm all French effort towards the Upper Rhine, weaken the French organisation upon its northern frontier, and so permit of a return of the allies to an attack there at a later time. Eugene of Savoy was a member of the cadet branch of that royal house. His grandfather, the younger son of Charles Emmanuel, had founded the family called Savoy Carignan. His father had been married to one of Mazarin's nieces. Eugene was her fifth son, and at this moment not quite forty years of age. His character, motives, and genius must be clearly seized if we are to appreciate the campaign and the battle of Blenheim.