During the First World War, the Commission for Relief in Belgium (CRB) supplied occupied Belgium with food, provoking discord between military and political leaders on both sides. The CRB's work undermined the Allies' economic blockade of the enemy, attracting military criticism. In Germany, politicians favoured sustaining the food supply to prevent unrest, whilst the Army wanted to exploit Belgium's resources. From 1916 onwards, the CRB became a bone of contention in Germany in the dispute between military and political leaders about unrestricted submarine warfare. It also loomed large in the political and military debate about the attitude to neutral countries: the Allies wanted them to brave the German threat and cooperate with the blockade policy—otherwise, food imports from Allied countries would be forbidden. Tonnage and food for the CRB were incorporated into the negotiations with neutral countries about their imports and the use of home-grown produce. The debates about the CRB thus exemplify the relationship between military events and the war's economic and social significance. This study of the CRB shows that political/diplomatic historiography can bridge the gap between the military and socioeconomic history of the First World War.