During the 1920s the Comintern developed a new policy for the Balkans, about collaboration between the communists and the Macedonian movement, and the creation of a united Macedonian movement. The idea for a new unified organization was supported by the Soviet Union, which saw a chance of using this well developed revolutionary movement to spread revolution in the Balkans and destabilize the Balkan monarchies. In the so-called "May Manifesto of 6 May 1924", for the first time the objectives of the unified Slav Macedonian liberation movement were presented: independence and unification of partitioned Macedonia, fighting all the neighbouring Balkan monarchies, forming a Balkan Communist Federation and cooperation with the Soviet Union.