 Complete the following phrase:  The region became part of the Kingdom of Prussia with the coronation of King Frederick I of Prussia in 1701 in Königsberg. Masuria became part of a newly created administrative province of East Prussia upon its creation in 1773. The name Masuria began to be used officially after new administrative reforms in Prussia after 1818. Masurians referred to themselves during that period as Polish Prussians or as Staroprusaki Old Prussians During the Napoleonic Wars and Polish national liberation struggles, in 1807, several towns of northern and eastern Masuria were taken over by Polish troops under the command of generals Jan Henryk Dąbrowski and Józef Zajączek. Some Masurians showed considerable support for the 