The Prague Spring reforms were an attempt by Dubček to grant additional rights to the citizens in an act of partial decentralization of the economy and democratization. Among the freedoms granted were a loosening of restrictions on the media, speech and travel.
The reforms were not received well by the Soviets who, after failed negotiations, sent thousands of Warsaw Pact troops and tanks to occupy the country. A large wave of emigration swept the nation. While there were many non-violent protests in the country, including the protest-suicide of a student, there was no military resistance. Czechoslovakia remained occupied until 1990.