Hannibal, alongside his army, crossed the Alps
Following the first Punic War, the Romans took over and replaced Carthage. As a result, Hannibal's maritime invasion of Rome was nearly impossible. He would need to receive initiation from all around the land. He intended to invade Rome across the great Alps because he was determined to take over Rome.
He began from Northern Spain with his men, traveled across Southern Gaul, and erected garrisons. He had a sizable army consisting of approximately 80000 soldiers, 4000 horses, and 37 elephants.
His plan was for beginning in the Autumn and continuing without the siege weapons. Even the guns couldn't have slowed down his goal; he didn't want them to.
They traveled to Italy in around 17 days, and their decision to go ahead with it paid off since it was a success.