In ancient times, for marching and fighting, the replenishment of grain and grass was an extremely important thing, which also had a great impact on the final victory or defeat, but in ancient times, when fighting, the soldiers could eat enough.
Generally speaking, the things eaten on the battlefield are very simple, the main role is to fill the hunger to ensure physical fitness, often more dry food and the like, and such as vegetables, meat and grease, are very rare, not realistic.
In the pre-Qin period, the military food on the battlefield was mainly soybeans, as well as corn and the like, there were also meat, vegetables are very rare and rare foods, and grease is basically not used, because it is not used for fried and other foods.
For a long time, corn was the main grain in the country, wheat was not completely a staple food in the north until the Song Dynasty, and the conditions on the battlefield were limited, and people cooked corn or wheat to eat it, and it did not need grease for cooking.
Most of the military food in ancient times was mainly a variety of staple foods, and the practice and consumption of these staple foods often did not require the use of grease, so it was difficult to appear grease on the battlefield, unless it was a long-term war.
If the war lasts for a long time, then it is also necessary to ingest oil, after all, this is also a must for the human body, and the oil eaten in ancient times is very different from what we eat now.
The earliest people ate animal fats, called "pastes", mainly lard or sheep fat, these animal fats and fats can be solidified and easy to preserve and carry, so it has become the mainstream edible oil on the battlefield.
The emergence of vegetable oil itself is relatively late, the rise of sesame oil during the Han Dynasty, and this sesame oil has been popular for a long time in ancient times, until the Song Dynasty is still the main vegetable cooking oil, but sesame oil and other vegetable oils are inconvenient to transport and preserve, and are often not used on the battlefield.
From the Beginning of the Southern and Northern Dynasties, the types of vegetable oil began to increase, and in the Tang and Song Dynasties, such as soybean oil, Suzi oil, flax oil, etc. have appeared, but various vegetable oils are still not as widely used as sesame oil.
The ancients called vegetable oil "oil", and animal oil is called "fat paste", the biggest difference between the two is that the oil has always been liquid and the fat paste can solidify, in terms of long-distance transportation, the fat paste is of course more advantageous, but also the most popular.
Soldiers on the battlefield, it is very good to be able to eat enough, sauce and vinegar seasoning, meat and vegetables are rare, such as if you want to eat oil is often mainly animal fat, vegetable oil is very slight, after all, animal oil is easy to carry and preserve.
Before the advent of iron pot stir-fry in the Song Dynasty, people ate grease, often used as frying or mixing food, such cooking speed is slow, the battlefield sudden changes, anything can happen at any time, there is no time to do fine dishes.
After the Song Dynasty, with the advent of iron pot stir-fry, cooking oil can speed up cooking, of course, on the battlefield, the same is true, the team transporting grain and grass often will also transport a certain amount of spices, grease, etc., so that soldiers can eat better to boost morale.
Generally speaking, the soldiers on the ancient battlefield were usually not easy to eat directly from grease and salt, and often those dry foods, such as flatbread and pots and helmets, were made with grease and salt to allow soldiers to replenish their physical strength.