The exhibition, the first of that kind here, marks the 30th anniversary of the 1989 Velvet Revolution.
Troops from the Warsaw Pact, a military alliance formed in 1955 between the Soviet Union and seven Eastern European nations, invaded Czechoslovakia on August 20, 1968 to crush liberal reforms enacted in the brief era known as the Prague Spring.
The Czech Republic is commemorating the 50th anniversary of the Soviet-led invasion in Czechoslovakia in 1968.
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