| 1. | The material effect depends on circumstances, as well-covered field fortification provide much protection.
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| 2. | After dark, Lee withdrew to prepared field fortifications along Mine Run.
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| 3. | It could be fired from an pillboxes and other types of field fortifications.
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| 4. | The field fortifications were constructed mostly to the west of the city limits.
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| 5. | Fortification is usually divided into two branches : permanent fortification and field fortification.
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| 6. | Defensive positions ran the gamut-from imposing castles, to field fortifications with trenches and ramparts.
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| 7. | None of the troops were ordered to construct field fortifications.
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| 8. | The Serbs also established a series of field fortifications blocking the approach to Nia.
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| 9. | Engineer stores were rushed forward to repair captured caves, quarry entrances and field fortifications.
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| 10. | Abatis is a military term for a field fortification made by cutting down trees.
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