| 21. | Scenes of trench warfare were shot at the military training camp at Liverpool.
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| 22. | Trench warfare prevailed on the Western Front from September 1914 until March 1918.
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| 23. | This CfD is turning into trench warfare and acrimony is increasing.
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| 24. | Four years of trench warfare laid out the tracks of his future thought.
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| 25. | Ironically, these trials better prepared the soldiers for the ordeals of trench warfare.
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| 26. | Trained in hand-to-hand combat, he became an expert in trench warfare.
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| 27. | WW1 trench warfare caused daggers and fighting knives to come back in play.
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| 28. | We're not seeing anything resembling trench warfare, and that seems unreal in war.
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| 29. | During this time, the fighting at Anzac evolved into largely static trench warfare.
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| 30. | The Western Front became an extremely bloody battleground of trench warfare.
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