Matching Pairs TRENCH DEFINITIONS WW1Online version Repaso de las Partes de una trinchera de la Primera Guerra Mundial by Estibaliz Martinez 1 Bunker 2 Sandbags 3 No Man’s Land 4 Wire Break 5 Trench Block 6 Communications Trench 7 Sump A block of barbed wire and wooden obstacles to stop any enemy soldier from advancing through the trench system. Trenches between the front line trenches and the support trenches, used by messengers to relay messages to the front line and back and for telephone wire to be strung up to the front line A break in the barbed wire to allow soldiers out into no man’s land An underground shelter. Often used for storage A bag filled with sand to protect the trench from flooding and the men from bullets. The area between the opposing sides’ front lines. A channel at the bottom of the trench to allow water to drain away.