Landships II

The previous volume from http://www.history.army.mil/html/bookshelves/collect/oob_us_lf_wwi_1917-1919.html (General Orders, Vol 16) includes General Order 60 dated Nov 13 1917 from the Chief of Staff which says (amongst much else):

III. 1. The following method of marking motor cars for the A. E. F. is prescribed:
Headquarters will be indicated by a metal marker 6" by 9". hung on the wind-shield
on the right side of the car.
Rank of general ofricers will be indicated by a metal marker 6" by 9". hung on the
wind-shield on the left side of the car.
These indications will also be displayed on markers of the same size on the rear of
the car. in such a position as to be illuminated by the taillight.
2. The cars of the different headquarters will be marked as follows:
The car of the Commander-in-Chief--The American flag.
The car of staff officers. headquarters. A. E. F.--Red. White and Blue.
The cars of an Army Commander and staff--Red and White.
The cars of a corps Commander and staff--White and Blue.
The cars of the Commanding General. Line of Communications and staff--White.
3. All mixed colors will be divided horizontally.
4. No flags of any kind will be flown from motor cars.

Which presumably would not contradict the Chief Quartermaster's memorandum but may be less than was said in the memorandum.