Third Punic War, 149–146 BCE
Cause: Roman leaders wanted to prevent Carthage from ever becoming strong enough to defeat Rome.
Main Events: Rome sent a force of 80,000 infantry and 4,000 cavalries to Carthage. The Carthaginians fought back bravely. The city held off the invading army for three years. In the end, the Romans overran Carthage. They destroyed the city and turned its 50,000 survivors into slaves.
Result: Rome won. The Roman army burned the city of Carthage to the ground.
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First Punic War, 264–241 BCE
Cause: Sicily is very close to the southern tip of Italy. Rome invaded Sicily to keep Carthage from taking full control of the island.
Main Events: Roman and Carthaginian armies fought on Sicily and at sea. To be able to compete with Carthage's navy, Rome built its own naval fleet.
Result: Rome won. Sicily became Rome's first province.
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During the Second Punic War
Feedback: Second Punic War, 218–202 BCE
Cause: A Carthaginian general, Hannibal, attacked and seized Saguntum, a Roman town in Spain.
Main Events: Hannibal's army, including a number of elephants, marched along the coast of Spain and through Gaul. Somehow, they crossed the cold and snowy Alps into northern Italy. They fought their way south, winning several battles.
(Extra: However, Hannibal had a problem. His army was too small to hold on to all the territory that it won. Rome's navy, meanwhile, kept Carthage from sending more troops to Italy. Some of Rome's allies in Italy helped Hannibal. But many stayed loyal to Rome.)
Result: Rome won. Carthage had to pay a yearly sum to Rome. The Romans took control of all of Spain.
Explanation: This is NOT from google! I know I'm late but hope this helps!