Book excerpt: Fort Ticonderoga, the allegedly impenetrable star fort at the southern end of Lake Champlain, is famous for its role in the French and Indian War. But many other one-of-a-kind forts were instrumental in staking out the early American colonial frontier. On the 250th anniversary of this often-overlooked conflict, this volume musters an impressive range of scholars who tackle the lesser-known but nonetheless historically significant sites from barracks to bastions. Civilian, provincial, or imperial, the fortifications covered in this book range from South Carolina's Fort Prince George to Fort Frontenac in Ontario and to Fort de Chartres in Illinois. These forts were built during the first serious arms race on the continent, as Europeans and colonists struggled to control the lucrative fur trade routes of the northern boundary. The contributors to this volume reveal how the French and British adapted their fortification techniques to the special needs of the North American frontier. By exploring the unique structures that guarded the borderlands, this book reveals much about the underlying economies and dynamics of the broader conflict that defined a critical period of the American experience.