Where were the string of forts located?

The string of forts, often referred to in historical contexts, typically refers to a series of military outposts established along strategic locations. For example, in the United States, the forts were primarily located along the western frontier, particularly in areas like the Great Plains and the Rocky Mountains, to protect settlers and trade routes. In other contexts, such as the Roman Empire, forts were strategically placed along borders and frontier regions to defend against invasions. The specific location can vary depending on the historical period and the empire or nation in question.