Central powers major victories

The major Allied powers were the United States, Britian, and the Soviet Union and the major Axis powers were Germany, Japan, and Italy.

Both UK and USA were the major world powers between 1870 and 1914.

The major allied powers were the United States, Britain and France.

The Washington Conference of 1921 significantly reduced the naval armaments of the major world powers. The major world powers involved were the U.S, Japan, France, and Great Britain.