*Sertorius in Spain, 83–78 B. C.* The rebellion in Spain was headed by Quintus Sertorius, who had been appointed governor of Hither Spain by Cinna in 83 B. C. Two years later he was driven out by Sulla’s representative, but, after various adventures, returned in 80 B. C. to head a revolt of the Lusitanians. His ability as a guerrilla leader, and the confidence which he aroused among the native Spaniards soon created alarm in Rome. Sertorius professed to take the field not against Rome but against the Senate. He regarded himself as the legitimate governor of Spain, employed members of the Marian party as his military and civil subordinates and organized a Senate among the Romans of his following. To crush the revolt Sulla sent out to Farther Spain Metellus, the consul of 80 B. C., but he failed to make any headway, and Sertorius was able to overrun Hither Spain also. In 79 B. C. the praetor of that province was killed in battle, and the same fate befell the proconsul of Narbonese Gaul who came to the help of Metellus (78 B. C.). *Pompey sent to Spain, 78 B. C.* It was imperative to send a new commander and a new army to Spain. As the consuls were unwilling to go, Pompey, who had refused to disband his army at the orders of Catulus, sought the command. The Senate could not help itself and, in spite of considerable opposition, passed a decree conferring upon him proconsular _imperium_ and entrusting him with the conduct of the war in Hither Spain. Even after the arrival of Pompey with an army of 40,000 men Sertorius was more than able to hold his own against his foes in 76 and 75 B. C. At the end of the latter year Pompey was forced to recross the Pyrenees and appeal to the Senate for reinforcements. At the same time Sertorius, through the agency of the pirates, entered into alliance with Mithradates, King of Pontus, who was again on the point of war with Rome. The arrival of the desired reinforcements enabled Pompey in 74 and 73 B. C. to turn the tide against Sertorius. To prevent desertions the latter resorted to severe punishments which alienated the Spaniards, who were already estranged by the acts of his subordinates. He was further hampered by dissensions in the ranks of his Roman supporters. The center of disaffection was Perpenna, who treacherously assassinated Sertorius in 72 B. C. and assumed command of his forces. However he was defeated by Pompey, taken captive and executed. The revolt was broken and pacification of Spain speedily accomplished. Pompey was able to return to Rome in 71 B. C. II. THE COMMAND OF LUCULLUS AGAINST MITHRADATES: 74–66 B. C.