Political map of East Asia and the Western Pacific 8 April 1907 (Anglo-French Agreement on Siam): The Russo-Japanese War (Russo-Japanese War) had threatened to embroil France and Britain, the allies of the two combatants. To preserve the peace between them, they signed the Entente Cordiale (Entente Cordiale). In Asia, this led to the division of Siam into spheres of influence in 1907 and the subsequent expansion of French Indochina and British Malaya at Siam's expense (Anglo-Siamese Treaty of 1909).