No
By Fighting for the empire in harsh Battles.
List the following countries.
The Roman Empire has been over for quite a number of years. They have no land holdings.
The Byzantine Empire, also known as the Eastern Roman Empire
There were many present day countries that were never part of the Roman empire, but here are four of them: Iran, India, Pakistan and Ireland.
Holy Roman Empire, England, and The Byzantine Empire
The Holy Roman Empire was dissolved by Napoleon, and became just a large number of small countries. In the years after the Napoleonic Wars ended, these countries came together in a confederacy called the Zollverein, or German Customs Union. This might be the best organization to call the replacement of the Holy Roman Empire.
The were were more than four European countries which were never part of the Roman Empire. They were: Denmark, Sweden, Norway, Finland, Poland, Latvia, Estonia, Lithuania, Belarus, Ukraine, Russia, Ireland and Iceland. Most of the Czech Republic, Slovakia and Moldova were not part of the Roman Empire, which only included slithers of these areas. Most of Germany was not part of the Roman Empire, which covered only the south. Hungary east of the River Danube was not part of the Roman Empire either.
No, the Romans used Roman law and governed according to Roman custom. That's why it's called an empire.
Germany
Rome began conquering other countries' lands and by this they expanded their Empire.