Simplify the following text for a Grade 12 native English-speaking person.
Original: The Swiss confederation allied with ten freed bailiwicks of the former Toggenburg seized the lands of the Thurgau from the Habsburgs in 1460 , and it became a subject territory of seven Swiss cantons ( Zurich , Lucerne , Uri , Schwyz , Unterwalden , Zug and Glarus ) .
Simplified: The Swiss confederation allied with ten freed bailiwicks of the former Toggenburg seized the lands of the Thurgau from the Habsburgs in 1460 , and it became subject territory of ZÃ 1\/4 rich .