Kammala jumla mai zuwa: An haifi L'Estocq a Celle, Electorate na Hanover, ɗan wani jami'in Prussian na Huguenot. A cikin 1757 ya zama jami'in cadet na rundunar Gensd'armes na Berlin. A lokacin Yakin Shekaru Bakwai, ya shiga cikin yaƙe-yaƙe na
Zorndorf, Kunersdorf, da kuma Torgau. Bayan yaƙin kusa da Langensalza, ya karɓi Pour le Mérite.