The reputation of Haldane as an army reformer has rested largely on his own writings. In his published memoirs, Before the War (London, 1920) and An Autobiography (London, 1929), Haldane, the former Secretary of State for War, argues that the perception of a new strategic purpose had underpinned his reform of the regular army. Meeting Sir Edward Grey a month after assuming office, in January 1906, he was informed that a Franco-German conflict was possible, and that Britain might be requested to assist France. A preliminary investigation by the Army Council was to reveal that it would take two months to mobilize and transport 80,000 men to France. Appalled by this calculation, Haldane claims that he resolved to provide a more prompt and sizeable contribution to the defence of France and the Channel ports. The new strategy depended upon a revision of mobilization planning; it also required the replacement of peacetime formations by an Expeditionary Force, whose size and organization reflected the military requirements of a Continental commitment. That January meeting had been fundamental. Haldane affirms:
I became aware at once that there was a new army problem. It was, how to mobilize and concentrate at a place of assembly to be opposite the Belgian frontier, a force calculated as adequate … to make up for the inadequacy of the French armies….