Imperial Japan's rapid industrialization and militarization under the slogan Fukoku Kyōhei (富国強兵, "Enrich the Country, Strengthen the Army") led to its emergence as a great power, eventually culminating in its membership in the Axis alliance and the conquest of a large part of the Asia-Pacific region. At the height of its power in 1942, the Japanese Empire ruled over a land area spanning 7,400,000 square kilometres (2,857,000 sq mi), making it one of the largest maritime empires in history.