World Middle Ages: (AD 476 to AD 65438+AD 0500)
The stage of modern world history: (1500 to 19 18)
The stage of modern world history: (A.D. 19 18 to present)
Others wrote the modern history to 1900, and the modern history of the world was after 1900. There is also the contemporary history of the world (1945 belongs to the category of contemporary history).
The period of World War II is (1939- 1945), and the period of post-cold war is (1946-199/year).
During the two world wars (1918-1939); The era of economic crisis (1929 to 1933) and the third era of scientific and technological revolution (1945 to present).