Left Opposition
Originally , the battle lines were drawn between Trotsky and his supporters who signed The Declaration of 46 in October 1923 on the one hand and a triumvirate ( also known by its Russian name "troika" ) of Comintern chairman Grigory Zinoviev , Communist Party General Secretary Joseph Stalin and Politburo chairman Lev Kamenev on the other hand . 
<triplet> General Secretary <subj> Joseph Stalin <obj> officeholder <triplet> Joseph Stalin <subj> General Secretary <obj> position held