Nyorai kuenderera mberi kweiyi ndima - Musi wa 20 Kukadzi 1741, akasimudzirwa kuva brigadier general, uye akatumirwa kuGerman neBritish contingent muHondo yeAustria yeMugari wenhaka. Akarwa paHondo yeDettingen
musi wa 27 Chikumi 1743, uye akazokwidziridzwa kuva mukuru mukuru musi wa 13 Chikunguru. Musi wa 30 April 1745, Onslow akatsiva Viscount Cobham semukuru mukuru uye kaputeni we1st Troop of Horse Grenadier Guards, apo Edward Wolfe akatora King's Regiment. Iye naHenry Hawley vakarayira mutsara wechipiri wevatasvi vamabhiza paHondo yeFontenoy. Akanga ari mumwe wavakuru vehondo vaivapo muLondon muna November pashure pokunge Hondo yeBritain muFlanders yadzoswa kuti ipedze kumuka kwaJacobite kwa1745.