The plot is based on invasion of Czechoslovakia in 1968.

That year saw the invasion of Czechoslovakia and the worldwide student protests.

Following the invasion of Czechoslovakia in 1968, pressure for neutrality increased.

He decided to remain there after the Soviet invasion of Czechoslovakia in 1968.

"And I admire his stand against the invasion of Czechoslovakia."

The 1968 Russian invasion of Czechoslovakia came as a surprise.

In 1968, he covered the Soviet invasion and occupation of Czechoslovakia.

But the Soviet invasion of Czechoslovakia in 1968 triggered another crisis.

And that had been the largest Soviet offensive since their invasion of Czechoslovakia.

Larisa's husband died in prison, where he was sent for protesting the 1968 invasion of Czechoslovakia.