Rubuta ci gaba ga wannan sakin layi - Ubangiji Charles Hay an haife shi c. 1700, ɗan na uku na Charles Hay, 3rd Marquess na Tweeddale, da matarsa Lady Susan Hamilton, 'yar William Douglas, Duke na Hamilton. Lord Charles shi ne ƙaramin ɗan'uwan John Hay, 4th Marquess na Tweeddale. Hay ya shiga rundunar, ya zama jarida a cikin 2nd Regiment of Foot Guards a ranar 18 ga Mayu 1722, kuma kyaftin a cikin 33rd Regiment of Foot a ranar 14 ga Mayu 1727. Ya kasance a bayyane yake a lokacin kewaye Gibraltar a 1727, kuma a 1729 yana aiki a matsayin kyaftin na 9th Regiment of Dragoons. Ya shiga aikin sa kai a cikin sojojin Yarima Eugene na Savoy a lokacin yakin Rhine na 1734 a cikin Yaƙin War na Poland. An zabe shi a matsayin dan majalisa na Haddingtonshire a shekara ta 1741 kuma a ranar 7 ga Afrilu 1743 an ba shi umurnin wani kamfani a cikin 3rd Foot Guards. Ya shiga cikin yakin Turai na War of Austrian Succession, kuma ya kasance mai gaskiya, idan ba ainihin ba, Laftanar-Colonel na 1st Regiment of Foot Guards a yakin Dettingen
da kuma Fontenoy.