Hessians
As was common at the time he hired mercenaries from Germany. Many of them came from the German state of Hesse-Kassel, thus they were called Hessians.
They're called mercenaries.
Hanover
They were Germans from the State of Hesse. Germany was not yet a single country, and each of the several states had their own alliances.
The British hired mercenaries from Germany to help their army. Hope this helps: :)
Mercenaries
Germany
hessians
The Hessians
The term "mercenaries from Germany" typically refers to individuals or groups from Germany who are paid soldiers engaged in military activities for hire, rather than for a national army. Historically, German mercenaries have been prominent in various conflicts, notably during the 17th and 18th centuries. In contemporary contexts, some private military companies based in Germany may also be referred to in this way, although their operations are often subject to strict legal and ethical regulations.
British. They were hired mercenaries from what is now modern-day Germany.
Mercenaries