Cæsar had also in mind plans of conquest. He had not forgotten that the Roman arms had been unsuccessful at Carrhæ, and he wished to subdue the Parthians, but the ghost of Pompey would not down. His sons raised the banner of revolt in Spain, and the officers sent against them did not succeed in their efforts to assert the supremacy of Rome. It was necessary that Cæsar himself should go there, and accordingly he set out in September. Twenty-seven days later he was on the ground, and though he found himself in the face of greater difficulties than he had anticipated, a few months sufficed to completely overthrow the enemy, who were defeated finally at the battle of Munda, not far from Gibraltar (March, 17, 45). Thirty thousand of them perished. Cæsar did not return to Rome until September, because affairs of the province required attention. Again he celebrated a triumph, marked by games and shows, and new honors from the senate. Cæsar's ambition now made him wish to continue the supreme power in his family, and he fixed upon a great-nephew named Octavius as his successor. In the fifth year of his consulate (B.C. 44), on the feast of Lupercalia (Feb. 15th), he attempted to take a more important step. He prevailed upon Marc Antony to make him an offer of the kingly diadem, but as he immediately saw that it was not pleasing to the people that he should accept it, he pushed the glittering coronet from him, amid their plaudits, as though he would not think of assuming any sign of authority that the people did not freely offer him themselves. [Footnote: "I saw Mark Antony offer him a crown; yet 't was not a crown neither, 't was one of these coronets; and, as I told you, he put it by once; but for all that, to my thinking, he would fain have had it. Then he offered it to him again; then he put it by again; but to my thinking, he was very loth to lay his fingers off it. And then he offered it the third time; he put it the third time by, and still as he refused it, the rabblement shouted and clapped their chapped hands, and threw up their sweaty night-caps, and uttered such a deal of stinking breath because Cæsar refused the crown, that it had almost choked Cæsar; for he swooned and fell down at it." Casca's account, in Shakespeare's _Julius Cæsar_, act i., sc. 2.] Cæsar still longed for the name of king, however, and became irritated because it was not given him. This was shown in his intercourse with the nobles, and they were now excited against him by one Caius Cassius Longinus (commonly called simply Cassius), who had wandered and fought with Crassus in Parthia, but had escaped from that disastrous campaign. He had been a follower of Pompey, and had fallen into Cæsar's hands shortly after the battle of Pharsalia. Though he owed his life to Cæsar, he was personally hostile to him, and his feelings were so strong that he formed a plot for his destruction, in which sixty or eighty persons were involved.