The principal Czechoslovak reformers were forcibly and secretly taken to the Soviet Union. Under obvious Soviet duress, they were compelled to sign a treaty that provided for the "temporary stationing" of an unspecified number of Soviet troops in Czechoslovakia. Dubcek was removed as party First Secretary on April 17, 1969, and replaced by another Slovak, Gustav Husak. Later, Dubcek and many of his allies within the party were stripped of their party positions in a purge that lasted until 1971 and reduced party membership by almost one-third. | The principal Czechoslovak reformers were forcibly and secretly taken to the Soviet Union. Under obvious Soviet duress, they were compelled to sign a treaty that provided for the "temporary stationing" of an unspecified number of Soviet troops in Czechoslovakia. Dubcek was removed as party First Secretary on April 17, 1969, and replaced by another Slovak, Gustav Husak. Later, Dubcek and many of his allies within the party were stripped of their party positions in a purge that lasted until 1971 and reduced party membership by almost one-third. |