The First Prussian Uprising was influenced by three major events [REF].
Prussians besieged Teutonic castles and managed to capture all except for Elbing (Elbląg) and Balga in the eastern regions of Natangia, Barta and Warmia; Thorn (Toruń), Culm (Chełmno), and Rehden (Radzyń Chełmiński) in the western parts [REF].