<a href="https://en.wikipedia.org/wiki/Vietnam_War" id="mw9w" rel="mw:WikiLink" title="Vietnam War">Vietnam War</a>: <a href="https://en.wikipedia.org/wiki/Operation_Swift" id="mw-A" rel="mw:WikiLink" title="Operation Swift">Operation Swift</a> begins when <a class="mw-redirect" href="https://en.wikipedia.org/wiki/United_States_Marines" id="mw-Q" rel="mw:WikiLink" title="United States Marines">U.S. Marines</a> engage the <a href="https://en.wikipedia.org/wiki/North_Vietnam" id="mw-g" rel="mw:WikiLink" title="North Vietnam">North Vietnamese</a> in battle in the <a href="https://en.wikipedia.org/wiki/Khe_Sanh" id="mw-w" rel="mw:WikiLink" title="Khe Sanh">Que Son Valley</a>.