they where the German troops hired by the British to help fight during the American Revolution. there where 3,500 hessians in america during the American Revolution. The term is an American synecdoche came from the German states of Hesse-Kassel and Hesse-Hanau.
The term "Hessians" refers to the approximately 30,000 German troops hired by the British to help fight during the American Revolution. They were principally drawn from the German state of Hesse-Cassel, although soldiers from other German states also saw action in America. (At the time, Germany was not a unified country but a collection of individual states that shared a language and culture.)
British Parliament passed the Stamp Act to help replenish their finances after the costly Seven Years' War with France. Part of the revenue from the Stamp Act would be used to maintain several regiments of British soldiers in North America to maintain peace between Native Americans and the colonists
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