During a lull in the intra-party fighting in the spring of 1926, Zinoviev, Kamenev and their supporters gravitated closer to Trotsky's supporters and the two groups soon formed an alliance, which also incorporated some smaller opposition groups within the Communist Party.
The alliance became known as the United Opposition.
In May 1926, Stalin, weighing his options in a letter to Vyacheslav Molotov, directed his supporters to concentrate their attacks on Zinoviev since the latter was intimately familiar with Stalin's methods from their time together in the triumvirate.
Following Stalin's orders, his supporters accused Zinoviev of using the Comintern apparatus in support of factional activities (the Lashevich Affair) and Zinoviev was dismissed from the Politburo after a tumultuous Central Committee meeting in July 1926.
Soon thereafter the office of the Comintern Chairman was abolished and Zinoviev lost his last important post.


Zinoviev remained in opposition to Stalin throughout 1926 and 1927, resulting in his expulsion from the Central Committee in October 1927.
When the United Opposition tried to organize independent demonstrations commemorating the 10th anniversary of the Bolshevik seizure of power in November 1927, the demonstrators were dispersed by force and Zinoviev and Trotsky were expelled from the Communist Party on 12 November.
Their leading supporters, from Kamenev down, were expelled in December 1927 by the XVth Party Congress, which paved the way for mass expulsions of rank and file oppositionists as well as internal exile of opposition leaders in early 1928.
During a lull in the intra-party fighting in the spring of 1926, Zinoviev, Kamenev and their supporters gravitated closer to Trotsky's supporters and the two groups soon formed an alliance, which also incorporated some smaller opposition groups within the Communist Party. The alliance became known as the United Opposition. In May 1926, Stalin, weighing his options in a letter to Vyacheslav Molotov, directed his supporters to concentrate their attacks on Zinoviev since the latter was intimately familiar with Stalin's methods from their time together in the triumvirate. Following Stalin's orders, his supporters accused Zinoviev of using the Comintern apparatus in support of factional activities (the Lashevich Affair) and Zinoviev was dismissed from the Politburo after a tumultuous Central Committee meeting in July 1926. Soon thereafter the office of the Comintern Chairman was abolished and Zinoviev lost his last important post.

Zinoviev remained in opposition to Stalin throughout 1926 and 1927, resulting in his expulsion from the Central Committee in October 1927. When the United Opposition tried to organize independent demonstrations commemorating the 10th anniversary of the Bolshevik seizure of power in November 1927, the demonstrators were dispersed by force and Zinoviev and Trotsky were expelled from the Communist Party on 12 November. Their leading supporters, from Kamenev down, were expelled in December 1927 by the XVth Party Congress, which paved the way for mass expulsions of rank and file oppositionists as well as internal exile of opposition leaders in early 1928.
Grigory Zinoviev