Hessians ( or ) were German soldiers who served as auxiliaries to the British Army during the American Revolutionary War. The term is an American synecdoche for all Germans who fought on the British side, since 65% came from the German states of Hesse-Kassel and Hesse-Hanau. Known for their discipline and martial prowess, around 30,000 Germans fought for the British during the war, around 25% of British land forces. While regarded, both contemporaneously and historiographically, as mercenaries, Hessians were legally distinguished as auxiliaries: whereas mercenaries served a foreign government of their own accord, auxiliaries were soldiers hired out to a foreign party by their own government, to which they remained in service. Auxiliaries were a major source of income for many small and relatively poor German states, typically serving in wars in which their governments were neutral. Like most auxiliaries of this period, Hessians served with foreign armies as entire units, fighting under their own flags, commanded by their usual officers, and wearing their existing uniforms. Hessians played a key role in the Revolutionary War, particularly in the northern theater. They served with distinction in many battles, most notably at White Plains and Fort Washington. The added manpower and skill of German troops greatly sustained the British war effort, though it also outraged colonists and increased support for the Revolutionary cause. The use of "large armies of foreign mercenaries" was one of the 27 colonial grievances against King George III in the United States Declaration of Independence, while the Patriots used the deployment of Hessians to support their claims of British violations of the colonists' rights. Origin and history The use of foreign soldiers was not unusual in 18th-century Europe. In the two centuries leading up to the American Revolution, the continent was characterized by constant warfare, and military manpower was in high demand. Germany was not yet a unified nation, but a collection of several hundred states loosely organized under the Holy Roman Empire. Conflict between and among these states led to the creation of professional armies, which were consequently experienced and well trained. Many German societies became militarized, with most men undergoing annual training from adolescence well into adulthood, often serving for life or until they were too old. German states varied considerably in size and wealth, and several came to rely on their troops as an economic resource, especially since sustaining a standing army was costly. When