Which incidents the rationing was introduced in 1940s?

Rationing was introduced in the 1940s in response to World War II, primarily due to the need to manage scarce resources and ensure fair distribution among the population. Key incidents leading to rationing included the disruption of supply chains, increased military demands for food and materials, and the threat of enemy blockades. In the UK, rationing began in 1940 with items like meat, sugar, and butter, while in the U.S., it followed in 1942 with commodities such as gasoline and rubber. These measures aimed to support the war effort and maintain civilian morale and nutrition during wartime shortages.