In June, 1386, Duke Leopold went to Baden, where he was assembling an army of knights. Besides his own vassals, knights came from adjoining countries with their horsemen, as well as the Margrave of Baden and the counts of Würtemberg. The army was nine thousand strong, including a large contingent of foot soldiers. The League naturally armed its followers and barricaded the cities. Zurich was the first point threatened. It was only a few miles from Baden and was the bulwark of the League. Its people soon learned that the Baron of Bonstetten, one of the ablest of the Austrian generals, was advancing against the city to lay siege to it. Although Zurich at that time was supplied with good walls and gates, it had not sufficient fighting men to withstand a siege any great length of time, and so had to send to the Four Forest Cantons for help. As soon as the request was received fourteen hundred men were sent. Rather than remain in idleness the League’s auxiliaries undertook expeditions into Kiburg and Thurgau and captured supplies in these unfriendly places, which would be needed during the siege.