Question about palette files

[unmerged(15982)]

In the GFX/palettes there are the following files: 2def.bmp through 22def.bmp.

What are these files and what do they do?

Theory: They seem related to tank sprites in some manner. Maybe each number (3def.bmp, 4def.bmp, 5def.bmp etc) relates to a specific level (Lt-1, Med-2 and Hvy-3) of a certian country class of sprites, i.e GER, ITA, MIN, ENG and FRA?
But in such a case, what levels of which countries?

Anyone got a clue?

 

[nachinus]

They are related to EVERY sprite, not only tank ones. Each sprite, in its .spr file, refers to one palette file that usually is unique for each one of them as it holds the colors it uses. If you make one sprite use other sprite's pallete, you'll see it ingame with the wrong colors.