What was the importance of each place in the military history of the Roman Republic – Carthage and Gaul

The struggle with Carthage required the development of a navalforce to augment Rome’s land force, and the 120 year struggleestablished Rome’s dominance in the Western Mediterranean andbeginning its involvement in the Eastern Mediterranean againstMacedonia.
The struggle to dominate Gaul extended Rome’s commitments fromsouthern Europe into the north, expanding its now standing militaryforce to conquer and then garrison Gaul then Britain, andcoincidentally launched Julius Caesar into dominance in Rome.