The German U-submarine was built by the Germans in early 1906, and the warship was sunk for the first time in 19 14. It was widely used in naval battles in Germany until World War II and was the main underwater warship in Germany. When a submarine performs a task, it needs a lot of time to prepare, so the soldiers in the submarine need to prepare a lot of food in advance and put it in the submarine.

When there is any military action, the submarine may take a long time to sail, so the soldiers always fill the idle corner of the submarine with food before preparing to sail. Usually, the weight of various materials carried by submarines can reach 10 thousand tons.

They sneak in the sea, of course, they don't eat much, unlike on land, where they eat whatever they want. On land, eating is very nutritious and can meet all kinds of nutritional needs of the body. Soldiers live in submarines. In order to meet their nutritional needs, they will bring fresh food, such as eggs, potatoes, vegetables, fruits, meat and bread.

The space in the submarine is very limited, so they must use the idle space to put as much fresh food as possible. Submarine kitchens are generally equipped with two stoves and a clean place where soldiers can get some cooked food to fill their stomachs. Under normal circumstances, the food on board can maintain soldiers' three meals a day.

They will not only bring fresh food, but also milk, drinks, tea and other drinks. If they run out of fresh food, they will also eat canned food, which can also provide them with vitamins necessary to maintain their physical strength.

In battle, they will meet the enemy's transport ship, they will sink the ship, and the poultry they catch will be delicious to them.