Final answer:
Hannibal did not get reinforcements from his brother because Roman General Scipio's tactics cut off his supply lines in Spain, leading to Hannibal's eventual defeat in the Second Punic War.
Step-by-step explanation:
During the Second Punic War, Hannibal led his Carthaginian army from Hispania to Italy in hope of conquering Rome and was initially successful in defeating Roman forces in a series of battles. However, Hannibal's hope for reinforcements from his brother was in vain as the Romans, adapting their tactics under the command of General Scipio, mounted a counter-offensive in Spain. In 207 BCE, Scipio's victory in Spain cut off Hannibal from receiving reinforcements and supplies, significantly weakening his army. The Romans then took the war to the Carthaginian homeland, forcing Hannibal to retreat from Italy to defend Carthage, where he was ultimately defeated at the Battle of Zama in 202 BCE by none other than Scipio Africanus himself.