Union of Liberation
The Kadets' base of support were primarily intellectuals and professionals; university professors and lawyers were particularly prominent within the party. Many Kadet party members were veterans of the zemstvo, local councils. The Constitutional Democratic Party formed from the merger of several liberal groupings, namely the Union of Liberation, the Union of Zemstvo Constitutionalists and the Union of Unions as well as the organization of bourgeois professionals and intellectuals, including teachers, lawyers, writers, physicians and engineers.