approach trench


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Noun1.approach trench - a trench that provides protected passage between the rear and front lines of a defensive positionapproach trench - a trench that provides protected passage between the rear and front lines of a defensive position
trench - a ditch dug as a fortification having a parapet of the excavated earth
References in periodicals archive ?
However, whenever a siege developed, the momentary need popped up again and the scramble was on to provide something to throw from the battlements at enemy sappers when an approach trench was within muscle range of the larger than average soldiers recruited as Grenadiers.