Britain's dilemma if the Anglo-Japanese Alliance survived Pearl Harbor

What might Britain do if the Anglo-Japanese Alliance survived and Pearl Harbor still led to war?

Britain would not be automatically committed, but could mediate or later intervene to protect its Far Eastern position, depending on the period and course of the war.

The Anglo-Japanese Alliance's defensive trigger applied when one partner faced two or more powers, so a bilateral Japanese-American war would not automatically require British entry. Britain could initially remain outside the fighting, limit opportunities for other states to exploit it, and press for a negotiated settlement that did not end in Japan's occupation. As the war continued, however, an unchecked American victory could threaten Britain's standing in the Far East and make intervention more attractive, especially if sharing the victory preserved British prestige. The Russo-Japanese War illustrates the legal distinction: Britain stayed out because France did not join Russia and create the required multi-power conflict.