Around 63 BCE.
Carthaginians
In my opinion, it didn't. Rome developed fear in the lands it conquered.
Rome conquered Britain in approx 40AD Ireland was never conquered
Rome conquered Carthage
rome
The barbarians who conquered Rome were called the Goths.
The expansion in the number of conquered people did not affect Rome's expansion because it was the product of her expansion.
nobody did. they never got conquered.
Ancient Rome conquered 31 countries.
Rome
The city of Rome was never conquered. What was conquered was most of the lands of the Western Roman Empire. What happened in 455 was that Rome was sacked by the Vandals. They did not stay in order not to have to face troops which would have been gathered around Italy to deal with them.
Basically Rome was conquered once by a German general by the name of Odoacer in 467 A.D. Because of this Rome gradually began to fall and in 410 A.D. Rome was captured by the Goths.