2. As a matter of economy and simplicity in Organization, the number of types of tanks should be kept to a minimum.  Reliance cannot be placed on a single type of tank, but two types, a light and a medium, should be capable of fulfilling all assigned missions.

3. These types should be as follows:

(a) - The light tank not exceeding 5 tons in weight and capable of being transported on heavy motor trucks.

(b) - The medium tank not exceeding 5 tons in weight, thereby bringing it within the limits of average highway bridges, the capacity of railroads and the limit of 5 tons placed by the War Department on the medium pontoon bridge.

4. Inasmuch as certain progress has already been made toward developing tanks of the medium type, first consideration should be given to that type, which is capable of doing all that is required of a light tank, except being transported in trucks. In the development of the medium tank, consideration should be given to the essentials necessary to make it a fighting machine.  Its speed should be the greatest possible consistent with the limitation in weight, economy in fuel and radius of action.  The control of speed should permit reduction to that of the advancing rifleman.

5. The armament of medium tanks should consist of machine-guns and guns of heavier caliber.  The guns should be capable of firing upon enemy troops in trenches and engage enemy tanks on a basis of equality; they should therefore be of as large caliber as is consistent with prescribed weight limits and ammunition supply, but no necessity is seen for high angle fire. The radius of action, vision and maneuverability of tanks should permit complete fulfillment of the assigned mission.  These essentials should be determined after a thorough study and experiment and concurrent with the development of pilot tanks. Auxiliary vehicles, except signal tanks, should not be of a type special to the tank service alone.

6. The tank is not likely to decrease in importance as a war weapon, but tank construction expensive and it must be expected that funds will be limited. It is, therefore, directed that developments be conducted along the following lines:

(a) The Chief of Ordnance will be allowed great latitude in the development of pilot tanks for test purposes, in close cooperation with the Chief of Infantry.

(b) The first program will be the development of suitable medium pilot tanks with their equipment, of a weight not exceeding 5 tons, and of a maximum speed of not less than twelve miles per hour.

(c) That for the present funds and effort will be applied principally to development purposes rather than to the construction of complete tank units.

(d) The manufacture of complete tank units will not be undertaken until suitable medium pilot tanks have been developed and have been approved by the War Department as the best type available.

(c) Tanks will not be designed with special adaptation to chemical warfare, except that if it be found practical to do so the tanks should be made gas-proof and supplied with a means of producing non-toxic smoke clouds. In this development, the Chief Chemical Warfare Service will be consulted.

(f) The development of special auxiliary vehicles for tank service alone will not be undertaken; but there is no objection to the consideration of general special purpose vehicles capable of meeting the general needs of the Army, as well as the special requirements for tanks.