 A period known as Occupied Japan followed after the war, largely spearheaded by United States General of the Army Douglas MacArthur to revise the Japanese constitution and de-militarize Japan.The Allied occupation, with economic and political assistance, continued well into the 1950s.Allied forces ordered Japan to abolish the Meiji Constitution and enforce the Constitution of Japan, then rename the Empire of Japan as Japan on May 3, 1947.