No region on Earth has seen more dramatic border changes than Europe. Germany alone has existed in at least seven different forms over the past millennium—from the fragmented Holy Roman Empire with its 300+ statelets, through unification, two world wars, division, and reunification. Poland completely disappeared from the map three times between 1795 and 1918. The Balkans have been called "the powder keg of Europe," with Yugoslavia alone fragmenting into seven nations. These shifts caused immense human suffering: millions displaced, ethnic cleansings, and conflicts that echo to this day.
- Holy Roman Empire: 962-1806 (~300 states)
- German Confederation: 1815-1866 (39 states)
- German Empire: 1871-1918 (unified)
- Weimar Republic: 1919-1933 (lost 13% territory)
- Nazi expansion: Austria (1938), Sudetenland, Poland
- Division: 1949-1990 (BRD/DDR)
- Reunification: October 3, 1990
- Polish-Lithuanian Commonwealth: largest European state (1600s)
- First Partition: 1772 (Russia, Prussia, Austria)
- Second Partition: 1793 (Russia, Prussia)
- Third Partition: 1795 (Poland erased from map)
- Restored: 1918 (after 123 years)
- WWII: Invaded by Germany AND Soviet Union
- Border shift: Lost east, gained west (1945)
- Ottoman rule: 14th-19th centuries
- Independence movements: Greece (1821), Serbia, Bulgaria
- Yugoslavia formed: 1918 (Kingdom of Serbs, Croats, Slovenes)
- Tito's Yugoslavia: 1945-1980 (6 republics)
- Breakup: 1991-2008 (violent wars)
- Slovenia, Croatia, Bosnia, Serbia, Montenegro, North Macedonia
- Kosovo independence: 2008 (disputed)
- Built: August 13, 1961 (overnight)
- Length: 155 km (96 miles) around West Berlin
- Deaths: 140+ attempting to cross
- "Death Strip" with guards, dogs, mines
- Fall: November 9, 1989
- Symbol of Cold War division
- Reunification followed 11 months later