The physical barrier itself would be supported by electronic sensors and extensive minefields.

The main attack went in, but it was turned back by the extensive minefields.

The Royal Air Force also laid an extensive minefield around the port, which forced the ship to remain in the harbor.

Traffic began to peter out and they found themselves in the middle of extensive minefields.

These defences became known as the Devil's gardens and are for the most part still there, especially the extensive minefields.

The official designation of this post was as supervisory office for the extensive minefields surrounding Singapore Island.

Soviet engineers began laying extensive minefields and barbed-wire belts.

Additionally, extensive unmarked minefields remain along the international border.

Because right across the entrance to the wide bay of Avacinskiy lies an extensive minefield, extending ten miles seaward.

Advancing military forces worked to clear mines from newly taken areas, but extensive minefields remained in place after the war.