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DEFENCE OBSTRUCTION |
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| SN | Sites and structures, often un-manned, intended to impede or confuse enemy forces. |
| CL |
DEFENCE |
| NT |
AIRCRAFT OBSTRUCTION
ANTI TANK DITCH ANTI TANK OBSTACLE BARBED WIRE OBSTRUCTION BARRAGE BALLOON SITE BEACH DEFENCE BOMBING DECOY CHEVAUX DE FRISE FLAME DEVICE FOUGASSE MINEFIELD ROADBLOCK TANK TRAP |
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