Treaty of Warsaw
With the January 1745 Treaty of Warsaw, Austria established a new "Quadruple Alliance" between Austria, Britain, Saxony and the Dutch Republic. Meanwhile, Emperor Charles Albert died on 20 January, destroying the rationale behind Frederick's alliance. Austria renewed its offensive against Bavaria in March 1745, decisively defeating the Franco-Bavarian army at the 15 April Battle of Pfaffenhofen, and making peace with MaximilianIII of Bavaria (the son of the late Emperor Charles Albert) by the Treaty of Füssen on 22 April.