Both sides had grievances. The Pompeians were not to be won by tactful treatment to accept Cæsar’s schemes, while his own followers often felt that their allegiance had secured no more favors from him than the open enmity of his former opponents. All experienced the common pressure of an exalted and unlimited authority, and were prepared to act together. The exact details of the conspiracy are obscure; they must have been arranged between the 15th of February and the 5th of March, on which date the Senate was to be called together in a building erected by Pompeius, to decide whether Cæsar was to be allowed to bear outside of Rome the title of king. The conspirators were at one against accepting such a proposal. Cæsar seemed not to realize his danger, since he paid no attention to the warnings that came to him. His mind was filled with the prospect of the Eastern war. Everyone realized that another victory would render all opposition unavailing. The conspirators would have to act before Cæsar could set out for the new campaign. In the plan to be followed the leading Senators were all accomplices. The way would be easy, provided Cæsar’s fellow Consul, Marcus Antonius, who could be relied upon to defend him, were prevented from coming to the Senate. Trebonius was to see that Antonius was detained and kept occupied elsewhere, while another of Cæsar’s friends of long standing, Decimus Brutus, undertook the necessary persuasion of the dictator should the latter hesitate to come to the Curia.