汎ヨーロッパ・ピクニック
The Pan-European Picnic (; ; ) was a peace demonstration held on the Austrian-Hungarian border near Sopron, Hungary on 19 August 1989. The opening of the border gate between Austria and Hungary at the Pan-European Picnic set in motion a peaceful chain reaction, at the end of which there was the German reunification, the Iron Curtain fell apart and the Eastern Bloc had disintegrated. The communist governments and the Warsaw Pact subsequently dissolved, ending the Cold War. As a result, this also led to the disintegration of the Soviet Union.