C-ration is a term that refers to the canned combat rations that were used by the US military from World War II until the 1980s. The term is an abbreviation for "combat ration", and it became widely used as a synonym for military rations. However, there are several other terms that are used for military rations such as MRE (Meals, Ready-to-Eat), IMP (Individual Meal Pack), MCW (Meal, Cold Weather) and TRM (Transitional Rations Module). Each of these different types of rations has specific characteristics and is designed for different purposes. Despite the variety of names, all of these military rations provide the necessary nourishment for soldiers in the field.