The third occupies the last few days only: it is concerned with the manœuvres immediately preceding the battle, and especially with the junction of Marlborough and Eugene, which made the victory possible.
The First Phase
From the junction of Marlborough and Baden to the fall of Donauwörth
When the Duke of Marlborough had joined hands with the forces of Baden upon the 22nd of June 1704 his general plan was clear: the last of his infantry, under his brother Churchill, would at once effect their junction with the rest at Ursprung, and he and Baden had but to go forward.
His great march had been completely successful. He had eluded and confused his enemy. He was safe on the Danube watershed, and within a march of the river itself. The only enemies before him on this side of the hills were greatly inferior in number to his own and his ally’s. His determination to carry the war into Bavaria could at once be carried into effect.
With this junction the first chapter in that large piece of strategy which may be called “the campaign of Blenheim” comes to an end.
Between the successful termination of his first effort, which was accomplished when he joined forces with Baden upon the Danube side of the watershed in the village of Ursprung, and the great battle by which Marlborough is chiefly remembered, there elapsed, I say, seven summer weeks. These seven weeks are divided into the three parts just distinguished.
In order to understand the strategy of each part of those seven weeks, we must first clearly grasp the field.
The accompanying map shows the elements of the situation.
East of the Black Forest lay open that upper valley of the Danube and its tributaries which was so difficult of access from the valley of the Rhine. In the hills to the north of the Danube, and one day’s march from the town of Ulm, were now concentrated the forces of Marlborough and the Duke of Baden. They were advancing, ninety-six battalions strong, with two hundred and two squadrons and forty-eight guns: in all, say, somewhat less than 70,000 men.