On the surrender at York Town in October 1781, Johnson returned home and remained unemployed until the peace. He subsequently commanded the 17th foot in Nova Scotia and Newfoundland. At the commencement of the war with France he was appointed inspector-general of recruiting for the English establishment in Ireland, and held the post until 1798. During the rebellion in that year he was detached with three thousand men to occupy New Ross, and defeated the rebels when they attacked the place on 5 June 1798. It was the hardest fight during the rebellion. Lord Cornwallis had an indifferent opinion of Johnson, and wrote of him as "a wrong-headed blockhead".