Dig for victory

During WWII britain and other nations started food rationing, which basically meant that everyone got a specified amount of food. No more, no less. Everyone had a 'ticket', or registration which allowed them to get food. Britain also encouraged as well as mandated people to use their land to grow food. For example, instead of gardens and flower beds people planted crops. People were also encouraged to raise animals, especially pigs.

The reason for this is that Germany specifically attempted to sink ships carrying food and supplies. This was a low tactic, for it hurt the citizens and innocent civilians. This was just one of the many tactics that germany and other nations used during WWII that is frowned upon.