In March 1918, Lenin moved the capital from St Petersburg to Moscow so that the government was further away from advancing White armies.
Nicholas II and his family were murdered in July 1918 by their Communist guards in the basement of the house where they had been held captive.
Lenin denied ordering the murder of the Tsar, instead blaming over-enthusiastic local officials, however it is hard to believe that such an act could have been carried out without his approval.
The Communists were worried that the Tsar could become a figurehead for the White armies in the Civil War.
The Politburo was created in March 1919 as Lenin wanted to concentrate decision-making into the hands of an even smaller group of Communist leaders.
The Politburo was Party, not government structure and it took over policy formulation from the 15-20 member Sovnarkom.
The Politburo usually consisted of between 7 and 9 members who held all of the significant power in Russia.
As the 1920s went on, Sovnarkom met less frequently as all the key decisions were made in the Politburo.
The Orgburo was created to supervise local party committees and the party secretariat in order to ensure that the Politburo's decisions and policies were being followed correctly.
Stalin was a member of both the Politburo and Orgburo, giving him significant influence within the Party, which he used to his advantage later in the 1920s.