The reason why the tank is gray is the same as above. After entering the Soviet Union, they were khaki. It can be seen from some historical color photos that the history of using camouflage in tanks is very good. There were many Germans in World War I, and they can be found. But the earliest monochrome camouflage uniforms in the world originated from the green uniforms of Boers in Ying Bu War, and the earliest camouflage uniforms originated from the E-camouflage uniforms of British troops in World War I. ..
Other countries use camouflage uniforms, such as E-mode Denison overalls used by Commonwealth paratroopers, various camouflage uniforms used by Soviet assault brigades and reconnaissance detachments, including the famous "circular saw" camouflage uniforms, the conjoined and split duck camouflage uniforms of the US military (similar to pea camouflage, which was not used in western Europe because of the accidental killing in Normandy), and the Italian St. Kyle camp was used in 1929.
In fact, camouflage uniforms at that time were still in the experimental stage, and many of them could only blur the shape of human bodies, which belonged to deformation camouflage and could not achieve the effect of camouflage stealth. At that time, the Soviet army had a two-color camouflage suit, which failed because of strong color contrast and was adopted by Kursk scouts. In addition, camouflage uniforms are mostly developed by grass-roots units or various services themselves, which is difficult to popularize. This is similar to our army's Vietnam War camouflage, such as five-leaf clover, gravel, summer spots and so on. , immature, narrow application. This also includes the camouflage of vehicles and military aircraft in World War II. The disguise of World War II is very casual. After the war, I interviewed a Soviet veteran who was driving a Sherman tank. He said that if he had dark paint on hand, he would disguise his tank. I believe this is also World War II, and there is a shortage of materials.