During the Warring States Period in Japan, why did the cavalry carry a big red pocket behind their backs during the war?

Every country will prepare some weapons during the war, and there will be many kinds of these weapons, some of which are strange. Just like Japan was given a big red envelope during the Warring States Period. During the Warring States Period in Japan, when there was a war between the two sides, there was a special kind of cavalry or infantry. They carried a "big bag" in red or other colors on their backs, which looked funny and made people feel funny.

It's better for cavalry to ride on horses, but it's a bit funny for short infantry to charge with this thing on their backs. They carry big red envelopes for a certain reason. They think that this will have an impact on each other's world, will buffer some of their own behaviors, and then create a time opportunity for themselves to beat each other, so they just think that they will have a better chance of winning.

Just like in ancient China, they would wear armor when fighting. They think it can protect themselves. Although armor can't completely protect itself, it can also cause a psychological comfort that it will play a great role. So although Japan can draw these things like this, it will still play some role. For example, when they fly in the war, the big red pockets will play a certain buffering role, giving each other a visual illusion, and then taking this opportunity to beat each other. This is a great chance of winning.

Later it was a kind of Japanese culture. In ancient times, fighting was a very sacred suggestion, because they wanted to protect their country and territory and their leaders, so his own fighting did not mean that they could do whatever they wanted, but fought for the honor of the country.