Strategic Air Policy, S.E.A.C. 1943/44. Note by Secretary [S.E.A. and I, 4296/DMI]

Reinforcement of Burma from outside 6. The comparative speed, ease and concealment with which troops can be moved into Burma by the Burma-Siam railway renders it improbable that any considerable forces will now enter the country by other routes. In particular, the enemy is no longer likely to risk and immobilize shipping tonnage by sending troops by sea to Rangoon. The principal reinforcement route thus becomes the railway Bangkok Pegu Thazi. 7. It cannot be guaranteed that advance intelligence will be obtained of the move of new reinforcements into and through Burma.