Vistula Land

Vistula Land, also known as Vistula Country (Russian: Привислинский край, romanized: Privislinsky kray; Polish: Kraj Nadwiślański), was the name applied to the lands of Congress Poland from 1867, following the defeats of the November Uprising (1830–1831) and January Uprising (1863–1864) as it was increasingly stripped of autonomy and incorporated into Imperial Russia. It also continued to be formally known as the Kingdom of Poland (Polish: Królestwo Polskie) until the fall of the Russian Empire.^[a]

Russia lost control of the region in 1915, during the course of the First World War. Following the 1917 October Revolution, it was officially ceded to the Central Powers under the terms of the 1918 Treaty of Brest-Litovsk.