Rubuta ci gaba don wannan sakin layi - Juan Antonio de Courten ya shiga rundunar sojojin Spain yana da shekaru 12 kuma ya yi aiki a cikin Rundunar Tsaro ta Walloon. Ya zama ensign a ranar 11 ga Janairu 1744 yayin da yake a sansanin soja a Rimini. Ya shiga cikin Yaƙin Nasara na Austriya, yana yaƙi a Yaƙin Velletri
a ranar 12 ga Agusta 1744 da yakin Piacenza a ranar 16 ga Yuni 1746. Ya kuma kasance a cikin kewaye da Alessandria, Tortona, da Valenza a wannan lokacin. A ranar 13 ga Agusta 1746 ya zama laftanan na biyu. Haɓaka zuwa laftanan na farko ya zo a ranar 22 ga Satumba 1754 kuma a shekara mai zuwa an nada shi babban jami'in mai kula da bindigogi.