Lieutenant Pack subsequently embarked at Southampton in command of a detachment of eighty dragoons destined for Quiberon Bay. After the failure of the emigrants there, he proceeded under the orders of Major-General Welbore Ellis Doyle to the Isle de Dieu, where he landed, and did duty for some months as field officer. In 1796, Lieutenant Pack returned to England, and on the 27th February of that year was promoted to the rank of captain in the fifth dragoon guards, which regiment he accompanied to Ireland, and was frequently engaged during the rebellion in that country, and was noticed in a despatch dated 21st of June 1798, from General the Marquis Cornwallis, K.G., on the occasion of Captain Pack’s detachment defeating a party of rebels, on the 19th of that month, between Rathangan and Prosperous. When the French landed a force in that country, Captain Pack was specially employed by General the Marquis Cornwallis, with a detached squadron, and after the surrender of General Humbert he was appointed to command the escort which was despatched in charge of him and the other French generals to Dublin. On the 25th of August 1798 Captain Pack was advanced to the rank of major in the fourth royal Irish dragoon guards, and embarked with his regiment in the expedition to Holland, but was countermanded, and stationed in England and Scotland until 1800, when he was promoted, on the 6th of December of that year, to the rank of lieutenant-colonel in the SEVENTY-FIRST regiment, and on the 24th of April 1801 joined that corps in Ireland, in which country he served until August 1805, when he embarked at Cork with the first battalion of the SEVENTY-FIRST regiment in the expedition to the Cape of Good Hope under Major-General Sir David Baird, and was engaged and severely wounded in effecting the landing at the Cape on the 6th of January 1806, but continued in the field, and was, on the 8th of January, in the action at Bleuberg. These operations led to a treaty, which was signed on the 19th of the same month, by which the Cape of Good Hope was surrendered to Great Britain.