Ostpreußen ist der Name der ehemaligen, bis 1945 bestehenden östlichsten preußischen Provinz, deren Ausdehnung (ungeachtet historisch leicht wechselnder Grenzverläufe) ungefähr der historischen Landschaft Preußen entspricht. Die Bezeichnung kam erst in der zweiten Hälfte des 18. Jahrhunderts in Gebrauch, als neben dem 1701 zum Königreich erhobenen Herzogtum Preußen mit seiner Hauptstadt Königsberg weitere, zuvor polnische Gebiete im Westen (beispielsweise das sog. Preußen Königlichen Anteils mit dem Ermland und Pommerellen) zu Brandenburg-Preußen kamen und die neue Provinz Westpreußen bildeten.
Heutzutage gehört das Gebiet der ehemaligen preußischen Provinz überwiegend zu Russland (Oblast Kaliningrad) und Polen (Woiwodschaft Ermland-Masuren). Das ehemalige sog. Memelland (auch Memelgebiet, lit. Klaipėdos kraštas) kam erstmals 1920 und erneut ab 1945 zu Litauen.
West Prussia is a historical region in present-day northern Poland. The region fell to Prussia as a result of the first partition of Poland-Lithuania in 1772 and received its name from the province of the same name formed by Frederick II in 1775, which also included parts of the historical landscapes of Greater Poland, Pomerania, Pomesania and Kulmerland. The Prussian province lasted in changing borders until the early 20th century. After World War I, parts fell to the Second Polish Republic, founded in 1918. The largest cities in West Prussia include Gdansk (Polish: Gdańsk, today Pomeranian Voivodeship), Elbląg (Polish: Elbląg, today Warmia-Masuria Voivodeship), and Thorn (Polish: Toruń, today Kujawsko-Pomeranian Voivodeship).
The German Empire was a state in Central Europe that existed from 1871 to 1945. The period from its founding until 1918 is called the German Empire, then followed the period of the Weimar Republic (1918/1919-1933) and the National Socialism (so-called Third Reich) from 1933 to 1945. 01.01.1871 is considered the day of the foundation of the German Reich.
Estonia is a country in north-eastern Europe. It is inhabited by around 1.3 million people and borders Latvia, Russia and the Baltic Sea. The most populous city and capital is Tallinn.
Today's Estonian state only regained its political independence in 1991 as a result of the so-called “Singing Revolution” in the Baltic states and in the wake of the collapse of the Soviet Union. Estonian independence was first proclaimed in 1918 and achieved through the “Estonian War of Independence” (1918-1920). As early as 1940, this first Estonian state was replaced by the “Estonian Soviet Socialist Republic”, which was founded under Soviet occupation. With an interruption due to the German occupation during the Second World War (1941-1944) and with slightly different borders, it was a constituent republic of the Soviet Union until 1991. Before 1918, the territory of present-day Estonia was part of the Russian Empire, with its northern part forming the Baltic Governorate of Estonia and its southern part the northern half of the Baltic Governorate of Livonia. In the High and Late Middle Ages and at the beginning of the early modern period, parts of today's country were also under Swedish, Danish and Polish rule, while the Livonian part was also under the sovereignty of the Teutonic Order until 1561.
Estonia has been part of the European Union and NATO since 2004.
Latvia is a Baltic state in the north-east of Europe and is home to about 1.9 million inhabitants. The capital of the country is Riga. The state borders in the west on the Baltic Sea and on the states of Lithuania, Estonia, Russia and Belarus. Latvia has been a member of the EU since 01.05.2004 and only became independent in the 19th century.