Question: What is the birthdate of this Anglo-Irish soldier and statesman who was one of the leading military and political figures of the 19th-century Britain, and for which Jean Victor de Constant Rebecque countermanded the order of him to evacuate Dutch troops? 
Sentence (from "David-Louis Constant de Rebecque"): He is also known for his contact with Voltaire and his correspondence with Isabelle de Charrière.
Relevant evidence: No