Meanwhile Albert the Lame of Austria, the last survivor of the numerous sons of Albert I.,[8] was arming to avenge the injury done to his kinsman and to vindicate Hapsburg rights in Swabia. In 1352 his troops advanced to the siege of Zürich, and the neighbouring towns and villages were called upon to send aid to the invaders. The people of Glarus, not far from Zürich, were dependent upon the abbey [Sidenote: Accession of Glarus, 1352.] of Seckingen, and the administration was in the hands of a steward appointed by the abbess. The Counts of Hapsburg had acquired, more than a century before, the position of advocate, or military champion, of the abbey, and this gave them a claim to the feudal service of the people of Glarus. But to the demands of Albert II. they replied that they were only bound to serve in the interests of the abbey of Seckingen, and refused to fight in a private quarrel of the duke. Albert at once sent a body of troops to coerce Glarus, but the inhabitants obtained the assistance of the Forest Cantons and repulsed them. The result was the conclusion of a permanent league between Glarus and its allies. The rights and revenues of both duke and abbess were expressly reserved in the treaty, and the people of Glarus promised to make no new alliances without the concurrence of the confederates. About the same time the league made its first conquest. Hitherto the various members had joined of their own accord; but now the league took the offensive, and to secure their own safety compelled the little town of Zug to join them. Zug lies between Zürich [Sidenote: Conquest of Zug, 1352.] and the Lake of Luzern, and was occupied by an Austrian garrison. The inhabitants of Schwyz marched to the walls and demanded its surrender, declaring that they had no intention to diminish the authority of the Duke of Austria or to change the constitution of Zug. As no aid came from Albert II., the townsmen found it necessary to submit, and were formally admitted to the league.