SECRET 4. Para. 5 We are not at all clear as to what our three lines consist of. With our lack of reserves, we doubt whether we have the depth to be entirely satisfied with our defensive positions on any of the lines as we know them. 5. Para. 7(a) Air Power. This statement is not wholly true, since the need remains to ensure that the Communists cannot bring into use airfields in North Korea from which their air forces might be brought effectively into the battle. (b) Armour and Artillery. We know so little about the Communist armour that we do not wish to make such a confident prediction.