His son Albert married Elizabeth, daughter of the Count of Tyrol, and thus that powerful and noble family was secured.

Henry of Bavaria he intimidated, and by force of arms compelled him to lead his troops to the standard of the emperor; and then, to secure his fidelity, gave his daughter Hedwige to Henry's son Otho, in marriage, promising to his daughter as a dowry a portion of Austria, which was then a feeble duchy upon the Danube, but little larger than the State of Massachusetts.
Ottocar was but little aware of the tremendous energies of the foe he had aroused.

Regarding Rhodolph almost with contempt, he had by no means made the arrangements which his peril demanded, and was in consternation when he heard that Rhodolph, in alliance with Henry of Bavaria, had already entered Austria, taken possession of several fortresses, and, at the head of a force of a thousand horsemen, was carrying all before him, and was triumphantly marching upon Vienna.

Rhodolph had so admirably matured his plans, that his advance seemed rather a festive journey than a contested conquest.

With the utmost haste Ottocar urged his troops down through the defiles of the Bohemian mountains, hoping to save the capital.