Louis de Watteville (born Abraham Ludwig Karl von Wattenwyl; 1 July 1776 – 16 June 1836)[1] was a Swiss mercenary in Dutch and British service.
[1] Watteville was born in Grandson, Switzerland to David Salomon von Wattenwyl and Elisabeth Magdalena Jenner, and first served as a mercenary in the Netherlands.
The regiment entered British service, and de Watteville fought with it in the French campaign in Egypt and Syria.
[2] By this time the regiment was a mixture of nationalities, including German, Italian and Hungarian, many of whom had been taken prisoner of war by the British while serving in the French armies in Spain.
On 17 September, American troops made a sortie against de Watteville's lines, leading to a bloody engagement in which about 600 men were killed or wounded on each side.