This region became a Prussian territory after it was seized by Frederick the Great in an invasion that started the War of Austrian Succession.
A duke of this region called Henry II the Pious was killed in a battle fought against invading Mongols at Legnica (leg-NIT-zuh). During one uprising in this region, a group called the "Werewolves" under Peter von Heydebreck (high-duh-BRECK) captured the Annaberg. A Russian-imposed import embargo and the mechanization of the British industry led to a cotton weaver uprising in this region in 1844. The Treaty of Versailles stipulated that the inhabitants of the (*) Upper part of this region had to hold a plebiscite, involving an invasion of the southeastern Cieszyn (SEE-zin) subregion before being resolved by the Spa Conference. This region became a Prussian territory after it was seized by Frederick the Great in an invasion that started the War of Austrian Succession. For 10 points each, name this region mostly located in Poland that borders Germany and the Czech Republic, and is centred around the city of Wroclaw.
A duke of this region called Henry II the Pious was killed in a battle fought against invading Mongols at Legnica (leg-NIT-zuh).
Silesia [or Upper/Lower Silesia; prompt on "Poland" before "Poland" is read]