World War II: A German submarine makes the first attack of the war against a United States warship, the <a about="#mwt32" data-mw='{"parts":[{"template":{"target":{"wt":"USS","href":"./Template:USS"},"params":{"1":{"wt":"Greer"},"2":{"wt":"DD-145"},"3":{"wt":"6"}},"i":0}}]}' href="https://en.wikipedia.org/wiki/USS_Greer" id="mwwg" rel="mw:WikiLink" title="USS Greer" typeof="mw:Transclusion">USS<span typeof="mw:Entity"> </span><i>Greer</i></a>.