Porto Rico Regiment of Infantry
... that the first shots by the United States in World War I were fired by the Porto Rico Regiment of Infantry from El Morro Castle at a German ship in San Juan Bay, Puerto Rico?
... that the first shots by the <a href="./United_States" id="mwIw" rel="mw:WikiLink" title="United States">United States</a> in <a href="./World_War_I" id="mwJA" rel="mw:WikiLink" title="World War I">World War I</a> were fired by the <b id="mwJQ"><a href="./Puerto_Ricans_in_World_War_I" id="mwJg" rel="mw:WikiLink" title="Puerto Ricans in World War I">Porto Rico Regiment of Infantry</a></b> from <a class="mw-redirect" href="./Fort_San_Felipe_del_Morro" id="mwJw" rel="mw:WikiLink" title="Fort San Felipe del Morro">El Morro Castle</a> at a <a href="./Germany" id="mwKA" rel="mw:WikiLink" title="Germany">German</a> ship in <a href="./San_Juan,_Puerto_Rico" id="mwKQ" rel="mw:WikiLink" title="San Juan, Puerto Rico">San Juan Bay</a>, <a href="./Puerto_Rico" id="mwKg" rel="mw:WikiLink" title="Puerto Rico">Puerto Rico</a>?