The BBC reminds us:
It does not detract from the relief operation in Asia to question the title almost routinely given to it as the ‘world's largest relief operation ever’. The huge American undertakings that fed millions of people during and after the World War I rescued not sections of populations but whole peoples. Today they have been largely forgotten. Yet 10 million people relied on food shipped in during the German occupation of Belgium and Northern France between 1914 and 1918. Tens of millions more were kept alive right across continental Europe after the war.