The First Silesian war was fought against the King of Prussia who died in what year?
First Silesian War:  It became the first in a series of three Silesian Wars fought between Frederick the Great's Prussia and Maria Theresa's Austria. Frederick the Great: Frederick II (German: "Friedrich" ; 24 January 171217 August 1786) was King of Prussia from 1740 until 1786, the longest reign of any Hohenzollern king.
1786