"As the war came to an end, and as the date for the expiry of the Anglo-Japanese Alliance drew closer, the FO had to ponder whether a renewal of the agreement still served British strategic needs. While Japan had proved a useful ally, particularly in the naval war, Japan’s aggressive actions on the Asian continent were clearly a menace to Britain’s imperial possessions. However, as the Admiralty pointed out at the end of the war, to abrogate the alliance would mean that Britain faced a period of naval inferiority in the Far East. For the FO, the position was even more complicated. American–Japanese relations had deteriorated during the war, and the Americans believed that the Anglo-Japanese Alliance was aimed at them. This, combined with American unhappiness over the British blockade during the First World War, raised the spectre of an Anglo-American naval race unless Washington could be convinced that no sinister Anglo-Japanese naval combination existed. The ideal solution would be an Anglo-American agreement in the Far East, but this was not a likely prospect. The FO thus had to balance good Anglo-American relations against the Far Eastern security provided by the ongoing relationship with Japan."