One battle is featured in every history book: the Battle of Dürnkrut, where Habsburg Rudolf drove his Bohemian rival Ottokar out of the Austrian lands. However, another confrontation between the two was no less dramatic—the Siege of Vienna. The second episode of Austria – The Complete History examines the encirclement of Vienna by Habsburg Rudolf I in the autumn of 1276, during which the roughly 20,000 people trapped inside were cut off from their food supply. A decisive factor in the defenders' surrender was the besieging army's threat to devastate the orchards and vineyards in the surrounding area.