An open territorial border allows free movement of people between two different countries or between a group of countries.

None of the rancho grants near the former border, however, were made after 1836, so none of them straddled the pre-1836 territorial border.

This prehistoric fortification of raised earthworks and palisades, on south facing inclines of drumlin hills, has long been regarded as a defensive formation and territorial border.

Beyond more hedges, the territorial borders are firmly drawn.

Not only did it define the territorial borders of the respective peoples, it also afforded security and furthered trade.