With that geo-historical background, Mackinder identified the northern-central core of Euro-Asia as the “pivot region” or “pivot state” of world politics. He placed Germany, Austria, Turkey, India and China, lands immediately adjacent to the pivot region, in an “inner crescent,” and the insular nations of Britain, South Africa, Australia, the United States, Canada and Japan in an “outer crescent.” He then warned that, “[t]he oversetting of the balance of power in favour of the pivot state, resulting in its expansion over the marginal lands of Euro-Asia, would permit the use of vast continental resources for fleet-building, and the empire of the world would then be in sight.” Mackinder suggested that either a Russo-German alliance or a Sino-Japanese empire (which conquered Russian territory) could contend for world hegemony. In either case, “oceanic frontage” would be added to “the resources of the great continent,” thereby creating the geopolitical conditions necessary for producing a great power that was supreme both on land and at sea.