The day before Jellacic 's surrender Surrendering , the French occupied Control the Austrian capital of Vienna , but the war would not be decided Deciding until the Battle of Austerlitz was fought Quarreling on 2 December .

The war would be determined on the continent , and the major land operations that sealed the swift French victory involved Participation the Ulm Campaign , a large wheeling manoeuvre by the Grande Armée lasting from late August to mid-October 1805 that captured Conquering an entire Austrian army , and the decisive French victory over a combined Cause_to_amalgamate Russo-Austrian force under Tsar Alexander I at the Battle of Austerlitz in early December .

Austerlitz effectively brought Bringing the Third Coalition to an end Process_end , although later there was a small side campaign against Naples , which also resulted in a decisive French victory at the Battle of Campo Tenese .

Victory at Austerlitz also permitted Preventing_or_letting the creation of the Confederation of the Rhine , a collection of German states intended as a buffer zone between France and central Europe .

Austerlitz had driven Motion neither Russia nor Britain , whose armies protected Defending Sicily from a French invasion Attack , to settle .

The outcome of the war Military_operation would be decided Deciding by the Battle Hostile_encounter of Austerlitz in early December .