of that vast empire. In fact, the success of the
autumn campaign was known to depend on the help of the Russians, who
were expected to reach the banks of the Inn before the 20th of
October, while it was thought that the French could not possibly reach
the Danube till twenty days later.[22] It was intended, however, to
act most vigorously in Italy, and to wage a defensive campaign on the
Danube.

Such was the plan concocted at Vienna, mainly under the influence of
the Archduke Charles, who took the command of the army in Italy, while
that of the Danube was assigned to the Archduke Ferdinand and Mack,
the new Quarter-Master-General. This soldier had hitherto enjoyed a
great reputation in Austria, probably because he was the only general
who had suffered no great defeat. Amidst the disasters of 1797 he
seemed the only man able to retrieve the past, and to be shut out from
command by Thugut's insane jealousy of his "transcendent
abilities."[23] Brave he certainly was: but his mind was always swayed
by preconceived notions; he belonged to the school of "manoeuvre
strategists," of whom the Duke of Brunswick was the leader; and he now
began the campaign of 1805 with the fixed purpose of holding a
commanding military position. Such a position the Emperor Francis and
Mack had discovered in the weak fortress of Ulm and the line of the
River Iller. Towards these points of vantage the Austrians now began
to move.

The first thing was to gain over the Elector of Bavaria. The Court of
Vienna, seeking to persuade or compel that prince to join the
Coalition, made overtures (September 3rd to 6th) with which he dallied
for a day or two until an opportunity came of escaping to the fortress
of Wuerzburg. Mack thereupon crossed the River Inn and sought, but in
vain, to cut off the Bavarian troops from that stronghold.
Accordingly, the Austrian leader marched on to Ulm, where he arrived
in the middle of September; and, not satisfied with holding this
advanced position, he pushed on his outposts to the chief defiles of
the Black Forest, while other regiments held the valley of the River
Iller and strengthened the fortress of Memmingen. Doubtless this would
have been good strategy, had his forces been equal in numbers to those
of Napoleon. At that time the Black Forest was the only physical barrier
between France and Southern Germany; the Rhine was then practically a
French river; and, only by holding the passes of that range could the
Aus