There are the following types:

First, leggings: leggings can not only be used as a therapeutic tool, but also play a role in stopping bleeding when soldiers are injured. It can also be tied to the legs when soldiers walk through the tropical rain forest to prevent soldiers from being hurt by poisonous insects and other creatures and reduce unnecessary waste of troops. It can also be used as a rope to climb mountains and bind prisoners of war. Uses are very diverse.

the second is canned lunch meat, which is the appearance of tin cans. In the earlier glass cans, food was put in glass bottles, and then air was pumped out to achieve the effect of preservation. But the glass bottle is too heavy, not only inconvenient to carry, but also fragile, which adds a lot of unnecessary waste in the battlefield. Compared with glass cans, tin cans have longer storage time, are easier to carry and reduce a lot of unnecessary waste. Soldiers are full, and their combat effectiveness is relatively higher.

The third one is a square oil tank. Although it is inconspicuous, it is very durable and easy to store and carry. Compared with the previous oil tank, the square oil tank is light and easy to carry, does not leak oil and can be reused. Greatly reduced the problem of lack of materials in the war. Improve combat effectiveness.

There are also some effective protection gizmos that can reduce the casualty rate of soldiers and effectively improve the combat rate in war. For example,

bullet-proof goggles can protect soldiers' eyes, effectively prevent soldiers' eyes from being injured by shell fragments, and greatly reduce the casualty rate in war. Effectively improve the war rate.

Helmets can protect soldiers' heads and prevent them from being killed by shrapnel. Before the helmet was invented, many soldiers were killed by fragments from shells. Helmets have also greatly reduced the casualty rate.