During World War I, the staple food of the Germans was radish. Even in the late war, they used sawdust as food. They made a lot of sawdust bread. Logistics materials can not be replenished and guaranteed in time, which leads to a serious decline in German combat effectiveness. On the other hand, on the American side, the logistics support is very sufficient. And there is a steady stream of food supplements. Moreover, the food nutrition of the US military is very balanced and rich. During the war, many American soldiers could even have a big meal like beef patties, which were made of whole wheat flour and beef was also made of fine beef.
It can be said that American soldiers got the best care at that time. At the same time, in addition to food, American drinks are also very good. At first, the American army drank rum. This wine is refreshing and delicious. But later, stimulated by alcohol, many soldiers began to fight with each other, causing some unnecessary conflicts. Later, the US military decided to supply coffee instead. The soldiers soon got used to this relatively soft drink. And coffee can make soldiers very energetic.
From here, we can see how different the American and German meals are. While eating and drinking, the soldiers' combat effectiveness is seriously low. On the other hand, the other side has enough energy to fight, so the result of this war is obvious.