![Entrance to a Sap along the French Front', First World War, 1915, (c1920). 'The mine subsequently exploded in this sap killed a great number of Germans'. A 'sap' was a covered trench, Entrance to a Sap along the French Front', First World War, 1915, (c1920). 'The mine subsequently exploded in this sap killed a great number of Germans'. A 'sap' was a covered trench,](https://c8.alamy.com/comp/W6P8J0/entrance-to-a-sap-along-the-french-front-first-world-war-1915-c1920-the-mine-subsequently-exploded-in-this-sap-killed-a-great-number-of-germans-a-sap-was-a-covered-trench-dug-by-sappers-often-experienced-civilian-miners-these-trench-were-filled-with-explosives-and-detonated-followed-by-an-attack-on-the-surprised-survivors-from-the-destroyed-position-from-quotthe-great-world-war-a-historyquot-volume-iii-edited-by-frank-a-mumby-the-gresham-publishing-company-ltd-london-c1920-W6P8J0.jpg)
Entrance to a Sap along the French Front', First World War, 1915, (c1920). 'The mine subsequently exploded in this sap killed a great number of Germans'. A 'sap' was a covered trench,
![The photographic history of the Civil War : in ten volumes . a siege. A famous sap appears in theu])per photograph—that built by Logans busy men, winding its way to^ ard The photographic history of the Civil War : in ten volumes . a siege. A famous sap appears in theu])per photograph—that built by Logans busy men, winding its way to^ ard](https://c8.alamy.com/comp/2CGK4FJ/the-photographic-history-of-the-civil-war-in-ten-volumes-a-siege-a-famous-sap-appears-in-theu-per-photographthat-built-by-logans-busy-men-winding-its-way-to-ard-the-strong-redan-of-the-veteranthird-louisiana-regiment-on-the-jackson-road-first-a-parallel-is-openedthat-is-a-trench-is-constructedparallel-to-the-besieged-entrenchments-from-this-are-constructed-seeral-ajjproaches-or-saps-to-enable-anapproach-to-be-made-under-cover-to-a-position-where-a-second-parallel-may-be-these-are-built-in-a-zigzagilirection-so-that-the-defender-cannot-enfilade-the-trench-except-when-very-2CGK4FJ.jpg)
The photographic history of the Civil War : in ten volumes . a siege. A famous sap appears in theu])per photograph—that built by Logans busy men, winding its way to^ ard
WW1 Colourised Photos - Men of the 1/4th Battalion, East Lancashire Regiment in a sap-head of a front line trench at Givenchy, 28 January 1918. (Photo source - © IWM Q 7265)
![An undated archive picture shows a French soldier in a sap trench just after being shelled at Mont Tetu near Massiges, eastern France An undated archive picture shows a French soldier in a sap trench just after being shelled at Mont Tetu near Massiges, eastern France](https://darkroom.baltimoresun.com/wp-content/uploads/2014/05/french-unseen-wwi194.jpg)
An undated archive picture shows a French soldier in a sap trench just after being shelled at Mont Tetu near Massiges, eastern France
![In military affairs, trench by which approach is made to a fortress, when within range of fire. This is sap on a rectangular plan, vintage line drawin Stock Vector Image & Art - In military affairs, trench by which approach is made to a fortress, when within range of fire. This is sap on a rectangular plan, vintage line drawin Stock Vector Image & Art -](https://c8.alamy.com/comp/2B76R1K/in-military-affairs-trench-by-which-approach-is-made-to-a-fortress-when-within-range-of-fire-this-is-sap-on-a-rectangular-plan-vintage-line-drawin-2B76R1K.jpg)