It was especially during the struggle against Hannibal that the inconvenience of the duality and of the annual change of the consular powers became evident;[541] but this never-ceasing cause of weakness was, as we have seen before, compensated by the spirit of patriotism. Here is a striking example: while Fabius was pro-dictator, Minucius, chief of the cavalry, was, contrary to the usual custom, invested with the same powers. Hurried on by his temper, he compromised the army, which was saved by Fabius. He acknowledged his error, submitted willingly to the orders of his colleague, and thus restored, by his own voluntary act, the unity of the command.[542] As to the continual change of the military chiefs, the force of circumstances rendered it necessary to break through this custom. The two Scipios remained seven years at the head of the army of Spain; Scipio Africanus succeeded them for almost as long a period. The Senate and the people had decided that, during the war of Italy, the powers of the proconsuls and prætors might be prorogued, and that the same consuls might be re-elected as often as might be thought fit.[543] And subsequently, in the campaign against Philip, the tribunes pointed out in the following terms the disadvantage of such frequent changes: “During the four years that the war of Macedonia lasted, Sulpicius had passed the greater part of his consulship in seeking Philip and his army; Villius had overtaken the enemy, but had been recalled before giving battle; Quinctius, retained the greater part of the year at Rome by religious cares, would have pushed the war with sufficient vigour to have entirely terminated it, if he could have arrived at his destination before the season was so far advanced. He had hardly entered his winter quarters, when he made preparations for recommencing the campaign with the spring, with a view of finishing it successfully, provided no successor came to snatch victory from him.”[544] These arguments prevailed, and the consul was prorogued in his command. Thus continual wars tended to introduce the stability of military powers and the permanence of armies. The same legions had passed ten years in Spain; others had been nearly as long in Sicily; and though, at the expiration of their service, the old soldiers were dismissed, the legions remained always under arms. Hence arose the necessity of giving lands to the soldiers who had finished their time of service; and, in 552, there were assigned to Scipio’s veterans, for each year of service in Africa and Spain, two acres of the lands confiscated from the Samnites and Apulians.[545] It was the first time that Rome took foreign troops into her pay, sometimes Celtiberians, at others Cretans sent by Hiero of Syracuse,[546] in fact, mercenaries, and a body of discontented Gauls who had abandoned the Carthaginian army.[547]