Kammala jumla mai zuwa: Stanhope yana aiki a matsayin jami'in diflomasiyya a Spain lokacin da War of the Quadruple Alliance ya fara a 1719 kuma ya shiga rundunar Faransa a karkashin Duke na Berwick a matsayin mai sa kai. Ya kasance tare da sojojin Berwick a lokacin nasarar da aka yi a San Sebastian. Lokacin da yaƙin ya ƙare a 1720, an nada Stanhope jakadan Birtaniya a Spain kuma an ba shi mukamin Kanar na 13th Light Dragoons, daga baya 13th Hussars; ya ci gaba da wannan matsayi har sai da
Yaƙin Anglo-Spanish ya fara ne a watan Maris na 1727, bayan da ya gina suna a matsayin dan diflomasiyya a lokacin mawuyacin lokaci.