The story was inspired by the Warsaw Pact invasion of Czechoslovakia in 1968.

The Warsaw Pact invasion of Czechoslovakia took only one day.

These actions are thought to have precipitated the Warsaw Pact invasion of Czechoslovakia.

During the Cold War the army prepared itself to defend against a Warsaw Pact invasion from the east.

His reforms were repealed following the 1968 Warsaw Pact invasion of Czechoslovakia.

While they were on their way, the 1968 Warsaw Pact invasion of Czechoslovakia took place.

After Warsaw Pact invasion of Czechoslovakia in 1968, he did not want to live any longer, and committed suicide.

No further violent uprising occurred in Czechoslovakia until the Warsaw Pact invasion of 1968.

Elements took part in the Warsaw Pact invasion of Czechoslovakia in 1968.

Arms analysts have come to consider a Warsaw Pact invasion to be the remotest of possibilities.

The story was inspired by the Warsaw Pact invasion of Czechoslovakia in 1968.

The Warsaw Pact invasion of Czechoslovakia took only one day.

These actions are thought to have precipitated the Warsaw Pact invasion of Czechoslovakia.

During the Cold War the army prepared itself to defend against a Warsaw Pact invasion from the east.

His reforms were repealed following the 1968 Warsaw Pact invasion of Czechoslovakia.

While they were on their way, the 1968 Warsaw Pact invasion of Czechoslovakia took place.

After Warsaw Pact invasion of Czechoslovakia in 1968, he did not want to live any longer, and committed suicide.

No further violent uprising occurred in Czechoslovakia until the Warsaw Pact invasion of 1968.

Elements took part in the Warsaw Pact invasion of Czechoslovakia in 1968.

Arms analysts have come to consider a Warsaw Pact invasion to be the remotest of possibilities.