Protecting the Empire’s Frontier tells stories of the roughly eighty officers who served in the 18th (Royal Irish) Regiment of Foot, which served British interests in America during the crucial period from 1767 through 1776. The Royal Irish was one of the most wide-ranging regiments in America, with companies serving on the Illinois frontier, at Fort Pitt, and in Boston, New York, and Philadelphia, with some companies taken as far afield as Florida, Spanish Louisiana, and present-day Maine....