When American troops are not free or stationed, they eat a kind of field rations, that is, standard kitchen cooking. Bread and potatoes are mainly starch, and rice is rare, so the taste of dishes naturally emphasizes American style. The ingredients are purchased locally, transported by logistics and provided by friendly countries nearby. MRE, which means combat rations, is distributed in combat. The troops serve 4 servings a day, which is a fast food form after sealed packaging. The staple food package+side dish package+snacks. During the first Iraq war, MRE was monotonous, with only four flavors. Later it was increased to 12 or 16. The navy is basically the same as usual, and these are always refrigerated on board.