The 1968 Russian invasion of Czechoslovakia came as a surprise.

This was primarily motivated by his fear of a Russian invasion.

On the opening day of the Russian invasion he shot down two bombers.

Supporting resistance against the Russian invasion in December 1979 is one thing.

With each provocation it seemed that the next step would be an outright Russian invasion.

This effectively pushed back the date of the Russian invasion, and forced him to carry out the plans in the winter.

In the event, no Russian invasion occurred and the guns were rarely if ever fired.

This was done for political reason, mainly to prevent Russian invasion.

The Russian invasion of 1979 stopped further visits from Western scholars.

What actually happened with the Russian invasion was something that had not even been considered.