Historian Dan Snow helps Michael Douglas understand why trench warfare was so important in WW1. As Michael tries to cross a field, he realises how clear a target he is and how important it is to be beyond the line of fire. He also learns that there was little protection from the cover of darkness as the battlefield could be illuminated with flares.

This clip is from:
World War One Centenary

Could be usde this clip as an introduction to why trenches were needed in WW1 and develop this by finding out what difference they made to everyday life for soldiers.