| 21. | Abatis ( obstacles made of felled trees ) were placed in front of the earth walls.
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| 22. | An advance guard from Curtis's brigade used axes to cut through the palisades and abatis.
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| 23. | They were further protected by ditches surrounding the works, abatis, and rifle trenches and breastworks.
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| 24. | A classic use of an abatis was at the Battle of Carillon during the Seven Years'War.
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| 25. | Feodor I of Russia had built the abatis on the line Livny-Kursk-Voronezh-Belgorod.
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| 26. | Though they were sprayed by grapeshot from American gunboats, the grenadiers forced their way into the abatis.
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| 27. | The insurgents camped in a village of Ignacew, with their positions reinforced by abatis and a rampart.
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| 28. | The use of cannon against the French works would have cleared paths through the abatis and breached the breastworks.
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| 29. | Ostrogs were often built in remote areas or within the fortification lines, such as the Great Abatis Line.
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| 30. | An important weakness of abatis, in contrast to barbed wire, is that it can be destroyed by fire.
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