While he still held the command of the military in his hands, Sulla used the military assembly (comitia centuriata) to annul all legislation passed by Sulpicius and to proclaim that all business to be submitted to the people should be dealt with in the comitia centuriata , while nothing at all was to be brought to the people before it received senatorial approval.
In effect this took away any which the tribal assembly (comitia tributa) and the plebeian assembly (concilium plebis) possessed. Also it reduced the power of the tribunes, who until then had been able to use the people's assemblies to by-pass the senate.
Naturally, it also increased the power of the senate.
Sulla did not interfere in the elections for the offices of consul, but to demand from the successful candidate, L. Cornelius Cinna, not to reverse any of the changes he had made.
This done Sulla left with his forces to fight Mithridates in the east (87 BC).