Dee ihe na-aga n'ihu na paragraf a - Monckton si Caribbean lọta ná ngwụsị afọ 1762. E mechara kpọọ ya Gọvanọ nke Mpaghara New York. Ọ nọgidere n'ọkwá a ruo 1765, ọ bụ ezie na ọ hapụrụ North America kpamkpam na 1763 ịlaghachi England. N'afọ 1765, a họpụtara Monckton ịbụ gọvanọ Berwick-upon-Tweed. N'afọ 1770, e buliri ya n'ọkwa lieutenant-general. Ka oge na-aga, Monckton nwere mmasị ịghọ onye isi ndị agha Britain nke India na agbanyeghị na ọ nwere nhọpụta nke East India Company na ụfọdụ nkwado eze, enyeghị ya ọkwa ahụ. Kama nke ahụ, a gwara ya ka ọ bụrụ onye isi ndị agha Britain na North America nke ọ jụrụ. N'afọ 1778, ọ ghọrọ gọvanọ nke Portsmouth na MP maka obodo ahụ na mmasị Admiralty. N'otu afọ ahụ, nwanne ya nwoke nke nta, Henry Monckton nwụrụ mgbe ọ na-edu ndị grenadiers na Agha nke Monmouth na New Jersey n'oge mwepụ nke Philadelphia. N'afọ sochirinụ, Robert Monckton haziri nchebe Portsmouth megide Armada nke 1779
(n'oge Agha Nnwere Onwe America). Monckton nwụrụ na 21 Mee 1782 mgbe ọ dị afọ 55 ma lie ya na St. Mary Abbot's Church, Kensington, London.