Answer:
The fertile soil of the Po and Tiber River Valleys allowed Romans to grow a diverse selection of crops, such as olives and grains. Roman armies blocked the coastal route to Rome.
Step-by-step explanation:
So the strategy was to cross into Italy and declare himself the liberator of Rome's allies. Hannibal's tactical genius allowed him to inflict heavy defeats on the Romans right away. Hannibal used many types of tactics that included rapid movements, rushes and ambushes. He assembled a massive army of 90,000-foot soldiers, a cavalry of 12,000, and at least 37 war elephants to march on Rome.
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