This is what I was looking for. More curiosities were found. In the former 4th Cavalry Division mechanization was very late and horses were last used for transport in the mid-80s. Infantry in 1960 still used bolt-action rifles. There's a table comparing how many battalions and other formations should have existed according to the official division formation and how many were actually formed. There were supposed to be 63 infantry battalions but only 33 were in existence.