Situated in the north of the country along the western half of the Belgian frontier, the department is unusually long and narrow.

Napoleon moved the 128,000 strong Army of the North up to the Belgian frontier.

It was several kilometres to the Belgian frontier.

As he sat at table the old man pointed out to me that contraband across the Belgian frontier, which is close by, was no longer profitable.

French strategy turned its back to the Belgian frontier and its face to the Rhine.

The remaining two-thirds of the Belgian frontier, from Hirson to the sea, was left undefended.

The best part of the French army was situated against the north of the Belgian frontier.

Travel presented no difficulties in these countries which were still at peace and long before her body was discovered he would be over the Belgian frontier.

When the three months were over, he was taken by night to a wood on the Belgian frontier.

Twenty-five miles to the west German forces were hurtling over the Belgian frontier.