 Complete the following phrase:  Faction members such as members of Workers Truth would be expelled from the Party in December 1923. Big opposition factions such as Leon Trotskys Left Opposition and such as oppositionist groups around Nikolai Bukharin and Grigory Zinoviev again appeared after the civil war ended. These factions were tolerated for several years, leading some modern Marxists to claim that the ban on factions was intended to be temporary. When Trotsky and Zinoviev were expelled on November 12, 1927, the ban on factions was however used to justify this, and there is no language in the discussion at the 