When the leader of the Duchy of Prussiaball died without an heir in 1618, Brandenburgball inherited its clay. He changed sides multiple times during the Thirty-Years War, eventually gaining independence from Poland-Lithuaniaball (his Prussian clay was still technically a vassal to them; isn't Feudalism fun?). During the second half of the 17th century, it honed its fighting skills until it was one of the best warriors in Europe. When Austria wanted help in the War of Spanish Succession, Prussiaball agreed to help him - on the condition that it could become the King in Prussia (as opposed to being the Duke of Prussia). Austriaball agreed, and in 1701 it became Kingdom of Prussiaball.