Pedzisa mutsara unotevera: Akazvarwa musi wa17 Kurume 1787 kuna Charles naAnn Fergusson, Fergusson akagadzwa saEnsign muna 1801, mu18th (Royal Irish) Regiment of Foot, asati aendeswa ku43rd (Monmouthshire) Regiment of Foot, achidzidziswa sechiedza chechiuto pasi paSir John Moore paShorncliffe. Akakwidziridzwa kuva lieutenant muna 1804, uye kaputeni muna 1806, akashanda muLight Division muHondo yePeninsular. Fergusson akanga aripo pahondo dze
Roliça, Vimeiro, (kwaakatambura maronda), uye Corunna, uko chikwata chake chakaumba chikamu chechengetedzo. Fergusson akaperekedza 43rd pa1809 Walcheren Expedition asati adzokera kuPeninsula, achiona chiito paRwizi Côa, Bussaco, Sabugal, Fuentes de Onoro, pamwe neCiudad Rodrigo neBadajoz, kwaakaumba chikamu chemapato e43 ekurwisa, achigamuchira maronda nguva mbiri. Akagamuchira menduru yegoridhe nokuda kwechiito chake paBadajoz. Zvichitevera chiito chakanaka paSalamanca muna 1812 akasimudzirwa kuva Major pasina kutenga, achitora nzvimbo mu79th Foot. Akashandurwa kuva 85th Foot, achiona chiito paBidassoa, Nivelle, Nive uye Bayonne.