Title: Umkämpfte Grenzen, umkämpfte Bevölkerung
Subjects: History, Territorial questions, World War, 1914-1918, Russo-Polish War, 1919-1920, Boundaries, World war, 1914-1918, poland, World war, 1914-1918, territorial questions, Poland, history
Places: Poland
Time periods: Wars of 1918-1921, 20th century