| 31. | Often the pitch was simply the grass of the field, with natural obstacles such as thistles in the way!
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| 32. | Expecting an attack across the open valley floor to the west, the Union left relied on natural obstacles for cover.
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| 33. | The barge hit all kinds of man-made and natural obstacles before the months-long odyssey was scuttled and the mansion demolished.
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| 34. | As a rule, ski routes allow off-piste skiing in deep powder snow without significant risk from avalanches or natural obstacles.
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| 35. | This means that the trails corners are tight and the tread strewn of natural obstacles such as rocks and roots.
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| 36. | Grant made reconnaissance, observed the natural obstacles and Confederate improvements, and knew the fort would not be taken by the 8th.
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| 37. | The woods furnish the individuals rugged lifestyle, as they are faced with natural obstacles like brutal weather and depleted food sources.
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| 38. | A wide gap existed to the west in the direction of Longuyon, covered only by blockhouses and natural obstacles such as rivers.
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| 39. | William Henry Harrison Murray's 1869 wilderness guidebook depicted the area as a place of relaxation and pleasure rather than a natural obstacle.
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| 40. | Unlike the U . S .-backed route _ which crosses the Caucasus Mountains _ this path is relatively void of natural obstacles.
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