Antio, we cannot attack Carthaginian lands outside of Sicily because we don't have a fleet. As far as Carthage knows at the moment, we are friendly to them. A large army stationed in the south will further convince them. If we capture Sicily, they will know that we're hostile, but we will still lack the ability to attack them further, and will have no choice but to linger! It is then that you should really worry about a Carthaginian attack. What you suggest is madness.