WORLD HISTORY

Detailed explanation-1: -Mercenaries are foreign soldiers serving for pay. In desperate need of soldiers to help with the invasions, Rome hired mercenaries to defend its borders. According to some historians, many were Germanic warriors who did not feel loyalty to Rome.

Detailed explanation-2: -As future Emperors would discover, while soldiers were loyal to their emperor, this loyalty was nothing compared to the loyalty felt by many legions to their commanders. Holding the monopoly on force that underpinned empire and emperor, the army was always politically important.

Detailed explanation-3: -Loosely defined, a mercenary is a soldier who fights for money rather than a cause or from loyalty or obligation to country. They’re usually ex-soldiers hired as bodyguards, though they have also been used in war.

Detailed explanation-4: -More recently the title has been used by the French Foreign Legion, the Spanish Foreign Legion and the Polish Legions. Members of these modern legions are often called légionnaires, the French term for legionary.

Detailed explanation-5: -Answer and Explanation: The Roman military needed mercenaries and non-Roman auxiliaries because the empire was getting too big to defend without hiring additional help and because Romans themselves gradually lost interest in military service.