 Complete the following phrase:  The first major attempt at uniting the Polynesian islands was by Imperial Japan in the 1930s, when various theorists chiefly Hachirō Arita began promulgating the idea of what would soon become known as the Greater East Asia Co-Prosperity Sphere. Under the Greater East Asia Co-Prosperity Sphere, all nations stretching from Southeast and Northeast Asia to Oceania would be united under one, large, cultural and economic bloc which would be free from Western imperialism. The policy theorists who conceived it, along with the Japanese public, largely saw it as a pan-Asian movement driven by ideals of freedom and independence from Western colonial oppression. In practice, however, it was frequently corrupted by militarists who saw it as an effective policy vehicle through which to strengthen Japans position and advance its domice within Asia. At its greatest extent, it stretched from 