Kammala jumla mai zuwa: Lisle ya shafe shekaru uku masu zuwa tare da rundunar sojojin Royalist da ke Oxford, da farko a matsayin Laftanar-Colonel na dragoons karkashin Arthur Aston. Ya shiga cikin Oktoba 1642 Battle of Edgehill kuma ya sami suna don ƙarfin zuciya da aminci, an bayar da rahoton cewa ya ƙi ɗaukar makamai a wani lokaci don tabbatar da mutanensa. A 1643, ya yi yaƙi a Chalgrove a watan Mayu, aka ji rauni a
Na farko Newbury a watan Satumba kuma ya ci gaba da zama colonel jim kadan bayan haka. Ya jagoranci rundunar soji a Cheriton a watan Maris na 1644 kuma a lokacin yakin da ke yamma ya umurci brigade ko tercio a Cropredy Bridge, Lostwithiel da Newbury na biyu.