This latter sense has been adapted and extended by modern historians concerned with the frontiers of the Roman Empire.
1842 laid the foundation of the plan under which the railways have since been developed, and mapped out nine main lines, running from Paris to the frontiers and from the Mediterranean to the Rhine and to the Atlantic coast.
The service in the departments comprises brigades, which are actually engaged in guarding the frontiers, and a clerical staff (service de bureau) entrusted with the collection of the duties.
The exiles were settled by Sparta in Thyreatis, on the frontiers of Laconia and Argolis.
The claims made by Germany to large areas of the hinterland gave rise to considerable negotiation with France and Great Britain, and it was not until 1899 that the frontiers were fixed on all sides (see Africa, § 5).
How would you define frontiers? Add your definition here.