However, it could be argued that ‘going over the top’ was, despite not being common, a major feature of trench warfare before 1917 and the introduction of tanks. This is because trench warfare was and there was little chance for armies to . The tactic of ‘ __ ’ was therefore very useful in breaking the . Many diaries and testimonies describe men ‘going over the top’ and whilst there were other used it certainly played its part. barrages were used frequently but in the end the men would have to leave their in order to ___.