The Romans took Italy and conquered each piece of it a little at a time.
Alexander the Great conquered the Persian Empire, but he did not conquer 'most of the world' - he did not get near east Asia, he did not conquer Europe, he did not conquer most of Africa, he had never even heard of North and South America or the Pacific. Addition: The typical expression is that Alexander the Great conquered "most of the known world" meaning that the majority of the areas that he did not conquer were not civilized at that time. Further: Alexander wanted to take India, but his army refused, and is recorded to have planned on moving through Europe, with Carthage and north Africa, Italy, Sicily and Spain as targets. Even he did not think that he had conquered 'most of the known world'.
Rome is the capital city of Italy and Rome didn't conquer Italy. It created it. Farming continued and today there is still farming.
The generals of Carthage in the punic wars was Hannibal and his son Hamilcar.
All or parts of the following European countries: Portugal, Gibraltar, Italy, France and Malta.
The "barbarians" never reached all of Italy. They only conquered just north of Italy, where Switzerland is located. They did try to conquer Italy, but failed. They failed because of where Rome is located, and of Italy's unique geography.
Areas in Italy, France, Germany, Gual (ancient country), Luxembourg, and Belgium.
Rome against Carthage, on the island of Sicily
Hannibal set off from southern Spain, which his family had conquered. He marched on the east coast of Spain and inland from the coast of southern France. He reached Italy by crossing the Alps.
They conquered Absynnia. It is now called Ethiopia. It has petroleum sources. They wanted those resources. Germany wanted it too.
Carthage in today's Tunisia, Rome in Italy !!
None, in fact they were flung out of the African countries they had conquered before the war.