Some of the English and other foreigners had got across the frontier.

It is one of the few cases where bodies were moved across international frontiers.

On the following day they conducted him safely across the frontier.

Somewhere across the frontier, someone had exposed him, perhaps without meaning to.

It is hard to deny the value of a free trade in ideas and information across international frontiers.

For five days, the two nations have exchanged artillery fire across the frontier.

He spent the succeeding years in colleges established across the frontier.

In this case, we have common interests across party divides and national frontiers.

The idea of having something similar across frontiers would make it even more complicated.

We need the capacity to combat terrorism across national frontiers.