In Photos: Things That Happened 50 Years Ago

By late summer, talks between the Soviets and Czech leaders were not going the way the Kremlin wanted, so more than 2,000 tanks and thousands more Warsaw Pact troops invaded and occupied the country in August. This column of Soviet tanks was lined up in a street in Prague, Czechoslovakia, near the Old Town Square, on August 28, 1968, after Czech leaders had returned from negotiations with the Russians.

Diether Endlicher / AP

Prague residents surround Soviet tanks in front of the Czechoslovak Radio station building in central Prague during the first day of a Soviet-led invasion of Czechoslovakia on August 21, 1968. Within a year, Dubček was removed from office, his reforms were undone, and a more Soviet-controlled government was installed.

Libor Hajsky / Reuters