30: The impact of the First World War on strategy by Hew Strachan

The First World War fundamentally altered our understanding of strategy — we should heed the insights of the era's leading thinkers and generals. Read by Leighton Pugh.

Image: First World War Commanders looking at a battle plan. Painting by Francois Flameng (1856-1923), 1916. Army Museum, Paris. Credit: Leemage/Corbis via Getty Images