He's not John Kapodistrias, but this leader allegedly placed guards around 
He's not John Kapodistrias, but this leader allegedly placed guards around a potato patch to trick peasants into stealing them. After his loss at the Battle of Kunersdorf, this man's capital was miraculously saved by the death of Elizabeth II. This author of the treatise Anti-Machiavel signed the Treaty of Breslau after winning the Battle of Mollwitz, allowing him to take over the duchy of Silesia. This ruler called himself the "First Servant of the State," corresponded with Voltaire, and opposed Maria Theresa on the basis of Salic Law in the War of Austrian Succession. For 10 points, name this enlightened despot who led Prussia during the Seven Years' War.
He's not John Kapodistrias, but this leader allegedly placed guards around a potato patch to trick peasants into stealing them.
Frederick the Great [or Frederick II of Prussia or Friedrich der Grosse or Friedrich II of Prussia; prompt on "Frederick" or "Friedrich"; do not accept anything involving "Frederick William"]