The <a href="https://en.wikipedia.org/wiki/United_States_Navy" id="mw2Q" rel="mw:WikiLink" title="United States Navy">U.S. Navy</a> commissions its <a href="https://en.wikipedia.org/wiki/United_States_E-class_submarine" id="mw2g" rel="mw:WikiLink" title="United States E-class submarine">first class</a> of <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Diesel_submarine" id="mw2w" rel="mw:WikiLink" title="Diesel submarine">diesel-powered submarines</a>.