What did Japan do to the U. S. and how did the US respond?

The United States was the main supplier of the oil, steel, iron, and other commodities needed by the Japanese military as it became bogged down by Chinese resistance but, in January, 1940, Japan abrogated the existing treaty of commerce with the United States.

a phrase from a poem by ralph waldo emerson about the battle of lexington and concord. emerson's words read, “here once the embattled farmers stood / and fired the shot heard round the world.”