Verrucosus, who wanted to negotiate. An embassy carrying an ultimatum was sent to Carthage, asking its senate to condemn Hannibal's deeds. The Carthaginian refused, triggering the Second Punic War. Initially, the Republic's plan was to carry war outside Italy, sending the consuls P. Cornelius Scipio to Hispania and Ti. Sempronius Longus to Africa, while their naval superiority prevented Carthage from attacking from the sea. This plan was thwarted by Hannibal's bold move to Italy. In May 218, he crossed the Ebro with a large army of about 100,000 soldiers and 37 elephants. He passed in Gaul, crossed the Rhone, then the Alps, possibly through the Col de Clapier (2,491 meters high). This famous exploit cost him almost half of his troops, but he could now rely on the Boii and Insubres, still at war with Rome. Publius Scipio, who had failed to block Hannibal on the Rhone, sent his elder brother Gnaeus with the main part of his army in Hispania according to the initial plan, and went back to Italy with the rest to resist Hannibal in Italy, but he was defeated and wounded near Pavia. Hannibal then marched south and won three outstanding victories. The first one was on the banks of the Trebia in December 218, where he defeated the other consul Ti. Sempronius Longus thanks to his brother Mago, who had concealed some elite troops behind the legions and attacked them from the rear once fighting Hannibal. More than half of the Roman army was lost. Hannibal then ravaged the country around Arretium to lure the new consul C. Flaminius into a trap, at Lake Trasimene. He had hidden his troops in the hills surrounding the lake and attacked Flaminius when he was cornered on the shore. This clever ambush resulted in the death of the consul and the complete destruction of his army of 30,000 men. In 216, the new consuls L. Aemilius Paullus and C. Terentius Varro mustered the biggest army possible, with eight legions – some 80,000 soldiers, twice as many as the Punic army – and confronted Hannibal, who was encamped at Cannae, in Apulia. Despite his numerical disadvantage, Hannibal used his heavier cavalry to rout the Roman wings and envelop their infantry, whom he annihilated. In terms of casualties, the Battle of Cannae was the worst defeat in the history of Rome: only 14,500 soldiers escaped; Paullus was killed as well