 The two Scipios wanted to attack this first, but were afraid that, if he was defeated, the other Hasdrubal and Mago might withdraw to forests and mountains and prolong the war.Thus, they divided their forces into two to cover the whole of Hispania.Publius was to lead two-thirds of the Romans and the Italian allies against Mago and Hasdrubal and Gnaeus was to lead one-third of the old army and the Celtiberians against Hasdrubal Barca.