Editing Casimir III the Great (section)

=== Politics and expansion ===
[[File:Insygnia królewskie Kazimierza Wielkiego.jpg|thumb|upright|The crown and royal insignia of Casimir the Great]]
Casimir demonstrated competence in foreign diplomacy and managed to double the size of his kingdom. He neutralized relations with potential enemies to the west and north, and began to expand his territory eastward. He conquered the Ruthenian kingdom of [[Halych]] and Volodymyr (a territory in the modern-day [[Ukraine]]), known in Polish history as Red Ruthenia and Volhynia. By extending the borders far south-east, the Polish kingdom gained access to the lucrative Black Sea trade.<ref>{{Cite book|last=Dobrawski|first=Partice M.|title=Poland: The First Thousand Years|publisher=Northern Illinois University Press|year=2016|isbn=978-0-87580-756-0|location=Illinois|pages=35}}</ref>