Food is critical to military performance, but it's also central to social interaction and fundamental to our sense of identity. The soldiers of the Great War didn't shed their eating preferences with their civilian clothes and the army rations, heavily reliant on bully beef and hardtack biscuit, were frequently found wanting. Nutritional science of the day had only a limited understanding of the role of vitamins and minerals, and the men were often presented with a diet that, shortages and logistics permitting, was high in calories but low in flavour and variety. Just as now, soldiers on...