9-year-old boy in Amsterdam during the hunger winter of 1944-5

The Dutch famine of 1944–45, known in the Netherlands as the Hongerwinter (literal translation: hunger winter), was a famine that took place in the German-occupied Netherlands, especially in the densely populated western provinces north of the great rivers, during the winter of 1944–45, near the end of World War II.

A German blockade cut off food and fuel shipments from farm towns. Some 4.5 million were affected and survived thanks to soup kitchens. Loe de Jong (1914–2005), author of The Kingdom of the Netherlands During World War II, estimated at least 22,000 deaths occurred due to the famine. Another author estimated 18,000 deaths from the famine. Most of the victims were reportedly elderly men.

The famine was alleviated by the liberation of the provinces by the Allies in May 1945. Prior to that, bread baked from flour shipped in from Sweden, and the airlift of food by the Royal Air Force, the Royal Canadian Air Force, and the United States Army Air Forces – under an agreement with the Germans that if the Germans did not shoot at the mercy flights, the Allies would not bomb the German positions – helped to mitigate the famine. These were Operations Manna and Chowhound. Operation Faust also trucked in food to the province.

More at the link, including this interesting bit:

The discovery of the cause of coeliac disease may also be partly attributed to the Dutch famine. With wheat in very short supply there was an improvement at a children's ward of coeliac patients. Stories tell of the first precious supplies of bread being given specifically to the (no longer) sick children, prompting an immediate relapse. Thus in the 1940s the Dutch paediatrician Dr. Willem Dicke was able to corroborate his previously researched hypothesis that wheat intake was aggravating coeliac disease. Later Dicke went on to prove his theory.