three slits for soldiers with sandbags for protection from enemy attacks in a trench dug

bags barricade cimone communication trench defence defense ditch dugout entrench oneself entrenched entrenchment excavating first world war foxhole grande guerra great gunny sack hessian bag italy jute military monte prima mondiale protection sacco sacking sandbag sandbags security shelter soldierly trenches trenching trincea warfare ww1 wwi