Chapter 2 examines how the creation of a justice system, like other institution-building exercises, formed an important part of re-establishing central state authority during this period. The Bolsheviks inherited a shattered state and their weaknesses, alongside widespread opposition, exacerbated the problem initially. As political courts targeting a wide variety of counter-revolutionary crimes, staffed by party members who proactively targeted criminals, tribunals were better placed to convey the authority and objectives of the state than other courts. Law became the ‘emissary of the state’, extending the state’s reach across Russia. This chapter explores the steady expansion of tribunals, including the establishment of military tribunals, transport tribunals, and travelling sessions of tribunals, as a means of exerting state authority from the end of 1918. Gradual unification of the system followed, but the Bolsheviks had re-established the state by 1922, and this achievement, the end of the civil war, and the publication of new law codes rendered many tribunals obsolete. Law’s purpose changed in a more stable Soviet Union, moving from revolutionary consciousness to revolutionary legality, although this chapter finishes by exploring the legacy of exceptional forms of justice and its continuance in the military and in the form of show trials.