Complex sentence: Kirchuster was attached to the manor, and during the Appenzell wars, Schwyz occupied the residential tower, hence, "Hans von Bonstetten" concluded a pact with Zürich in 1407.
Split into simpler sentences: Kirchuster was attached to the manor, and during the Appenzell wars, Schwyz occupied the residential tower. After the Appenzell wars "Hans von Bonstetten" concluded a pact with Zürich in 1407.