The Czech Republic is commemorating the 50th anniversary of the Soviet-led invasion in Czechoslovakia in 1968.

Image left: In this Aug. 24, 1968 file photo thousands of protesters are seen sitting at Wasceslas square in down town Prague, Czechoslovakia, demonstrating against the Russian invasion, surrounding the statue of King Wenceslas. (AP/File photo) Image right: In this picture taken on Aug. 16, 2018, tourists take photo of the statue of King Wenceslas downtown Prague.
Image left: In this Aug. 24, 1968 file photo thousands of protesters are seen sitting at Wasceslas square in down town Prague, Czechoslovakia, demonstrating against the Russian invasion, surrounding the statue of King Wenceslas. (AP/File photo) Image right: In this picture taken on Aug. 16, 2018, tourists take photo of the statue of King Wenceslas downtown Prague. ( Petr David Josek / AP )

An hour before midnight on 20 August,1968, Soviet-led tanks and troops invaded Czechoslovakia enacted in the brief era known as the Prague Spring.

The move was met with mass protests and deadly street battles between civilians and Warsaw Pact country soldiers.

Image on top: In this Aug. 21, 1968 file photo, Czech youngsters holding Czechoslovakian flags stand on top of an overturned truck as other Prague residents surround Soviet tanks in downtown Prague, Czechoslovakia. (Libor Hajsky/CTK via AP/File photo) Image bottom: In this picture taken on Aug. 16, 2018 cars drive downtown Prague.
Image on top: In this Aug. 21, 1968 file photo, Czech youngsters holding Czechoslovakian flags stand on top of an overturned truck as other Prague residents surround Soviet tanks in downtown Prague, Czechoslovakia. (Libor Hajsky/CTK via AP/File photo) Image bottom: In this picture taken on Aug. 16, 2018 cars drive downtown Prague. ( Petr David Josek/ AP )

The result would be more than 20 years of occupation by the Soviet Union.

Soviet troops withdrew only after the anti-communist 1989 Velvet Revolution.

Image on top: In this Aug. 21, 1968 file photo, a Soviet tank and an armoured personnel carrier move into downtown Prague as part of the occupation of the Czech capital and other parts of the country by troops of Russia, Poland, Hungary, Bulgaria and East Germany. (AP/File photo) Image on bottom: In this picture taken on Aug. 16, 2018 cars drive downtown Prague.
Image on top: In this Aug. 21, 1968 file photo, a Soviet tank and an armoured personnel carrier move into downtown Prague as part of the occupation of the Czech capital and other parts of the country by troops of Russia, Poland, Hungary, Bulgaria and East Germany. (AP/File photo) Image on bottom: In this picture taken on Aug. 16, 2018 cars drive downtown Prague. ( Petr David Josek/ AP )
Image left: In this Aug. 21, 1968 file photo Prague residents carrying a Czechoslovakian flag and throwing burning torches, attempt to stop a Soviet tank in downtown Prague, Czechoslovakia. (Libor Hajsky/CTK via AP/File photo) Image on right: In this picture taken on Aug. 16, 2018 cars drive downtown Prague.
Image left: In this Aug. 21, 1968 file photo Prague residents carrying a Czechoslovakian flag and throwing burning torches, attempt to stop a Soviet tank in downtown Prague, Czechoslovakia. (Libor Hajsky/CTK via AP/File photo) Image on right: In this picture taken on Aug. 16, 2018 cars drive downtown Prague. ( Petr David Josek/ AP )
Source: AP