Ukrainian irredentism

Ukrainian ultranationalist political organization

underground Ukrainian nationalist organization, 1920s–1930s

Ukrainian-led insurrection in Bessarabia, 1919

claims by Ukrainian nationalists to territory outside Ukraine

thumb|right|300px|Zakerzonia Zakerzonia (; ) is an informal name for the territories of Poland to the west of the Curzon Line which used to have sizeable Ukrainian (old name: Rusyn/Ruthenian) populations, including significant Lemko, Boyko populations, before the invasion of Poland by the Soviet Union and Nazi Germany in 1939, and were claimed as ethnically Ukrainian territories by Ukrainian nationalists in the aftermath of World War II. However, before 1939, the areas of Zakerzonia were mostly inhabited by Poles, who constituted about 70% of the population of this area. Ukrainians lived in a