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- Q621719 subject Q8790812.
- Q621719 abstract "Template:ForSapping is a term used in siege operations. Any trench excavated under defensive musket or artillery fire that was intended to advance a besieging army's position in relation to the works of an attacked fortification was referred to as a sap. Saps of approach were excavated by brigades of trained soldiers, often called sappers, because they dug the saps, or specifically instructed troops of the line.By using the sap (trench) the besiegers could move closer to the walls of a fortress, without exposing the sappers to direct fire from the defending force. To protect the sappers, trenches were usually dug at an angle in zig-zagged pattern (to protect against enfilading fire from the defenders) and at the head of the sap a defensive shield made of gabions (or a mantlet) could be deployed.Once the saps were close enough, siege engines or cannons could be deployed to batter a breach in the curtain walls. Prior to the invention of large pieces of siege artillery, miners could start to tunnel from the head of a sap to undermine the walls. A fire or gunpowder would then be used to create a crater into which a section of the fortifications would fall creating a breach.".
- Q621719 thumbnail Sap_Roller.jpg?width=300.
- Q621719 wikiPageExternalLink index-frame.html.
- Q621719 wikiPageExternalLink www.civilwarfortifications.com.
- Q621719 wikiPageWikiLink Q1130553.
- Q621719 wikiPageWikiLink Q1324245.
- Q621719 wikiPageWikiLink Q1341672.
- Q621719 wikiPageWikiLink Q1411608.
- Q621719 wikiPageWikiLink Q185205.
- Q621719 wikiPageWikiLink Q188055.
- Q621719 wikiPageWikiLink Q2284765.
- Q621719 wikiPageWikiLink Q49940.
- Q621719 wikiPageWikiLink Q524189.
- Q621719 wikiPageWikiLink Q63249.
- Q621719 wikiPageWikiLink Q7510052.
- Q621719 wikiPageWikiLink Q81103.
- Q621719 wikiPageWikiLink Q8676.
- Q621719 wikiPageWikiLink Q8790812.
- Q621719 wikiPageWikiLink Q88272.
- Q621719 wikiPageWikiLink Q88512.
- Q621719 comment "Template:ForSapping is a term used in siege operations. Any trench excavated under defensive musket or artillery fire that was intended to advance a besieging army's position in relation to the works of an attacked fortification was referred to as a sap.".
- Q621719 label "Sapping".
- Q621719 depiction Sap_Roller.jpg.
