Wastern Rome is a term which does not exist. Please clarify what you mean.
The Ostrogoth's were part of a Germanic tribe from western Russia that conquered Rome. (which was on the western side of the Roman empire.)
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.
They were both conquered by Barbarians. But the Barbarians completely conquered the western side while they conquered a little bit of the eastern side. The eastern side lasted longer than the western side. They both are parts of ancient Rome.
Rome was conquered in 530
The original Romans came from the city of Rome in what is now Italy. They conquered most of the known western world and used the people of conquered lands as slaves and soldiers. Many of these people also became Roman citizens.
Carthaginians
Rome conquered Britain in approx 40AD Ireland was never conquered
In my opinion, it didn't. Rome developed fear in the lands it conquered.
The Germanic tribe that conquered Rome in 476 AD was the Ostrogoths, led by their king, Odoacer. This event marked the end of the Western Roman Empire.
The city of Rome never actually fell. It was not conquered. What fell was the western part of the Roman Empire. It fell under the strain of the invasion by the Germanic peoples.
Rome conquered Carthage
Western Europe South Africa Which land was not conquered by the Mongols?