In 1931, the severity of the depression increased when the Federal Reserve Board raised interest rates.

The costliest battle in the history of the United States Marines Corps was The Battle of Iwo Jima.

In 1961, President John Kennedy saw most of his legislative success in the area of tariff reductions.

Washington Conference, also called Washington Naval Conference (1921–22), was an international conference called by the United States to limit the naval arms race and to work out security agreements in the Pacific area.

The Kellogg–Briand Pact is a 1928 international agreement in which signatory states promised not to use war to resolve "disputes or conflicts of whatever nature or of whatever origin they may be, which may arise among them".