munitions that are not easy to supply even in the modern era

(1)~ Heavy due to the weight compared to the honest amount of 1kg per liter
(2)- Because it is in liquid state, it needs containers to be held, but it is not compressed like combat food-but if it is made solid, it increases in volume and is inefficient- even if it is stored, it is difficult to store it as long as combat food
(3)- Even if you want to procure it locally, you need local cooperation or additional filtration equipment and water purification process. If the water supply is cut off despite so many disadvantages, the operation will be ruined like climbing horse speed