Kammala jumla mai zuwa: An san Charles a matsayin Count of Harcourt-Elbeuf yayin da mahaifinsa yake da rai; daga kimanin 1650, ya tsara kansa a matsayin "sarkin d'Harcourt", gundumar Harcourt tana ɗaya daga cikin taken mahaifinsa. Ya yi aiki a Italiya (1641) da Picardy (1642) a ƙarƙashin umarnin kawunsa Henri, Count of Harcourt. Charles ya taka rawa sosai a cikin Yaƙin Shekaru talatin; yana tare da "le Grand Condé" (sa'an nan Duke na Enghien) a sanannen nasara a Rocroi a 1643. Charles ya kuma kasance wani ɓangare na yaƙe-yaƙe a Thionville da Sierck, da kuma kewaye da Gravelines (1644); ya yi yaƙi a cikin
Yaƙin Nördlingen (1645) da kuma a Trier.