They also entered the Old Zürich War on the side of Zürich, and Wildhans von Breitenlandenberg was beheaded with his entire garrison at the siege of Greifensee in 1444.
The passage describes a historical event where a group supported Zürich during the Old Zürich War and resulted in the execution of Wildhans von Breitenlandenberg and his troops at the siege of Greifensee in 1444.