Why? Why not?
Just like it says.
This section contains manuals from military establishments throughout the world, along with some civilian documents either created for military hardware or for some civilian variant thereof.
Bear in mind that a civilian variant’s manual or other civilian document may be missing crucial information regarding the proper use and maintenance of the military original and should NOT be considered an accurate guide in such circumstances. In other words: God gave you a brain; USE IT.
All documents are in English and .PDF format unless specifically stated otherwise.