<i id="mweA"><a href="https://en.wikipedia.org/wiki/RMS_Leinster" id="mweQ" rel="mw:WikiLink" title="RMS Leinster">RMS Leinster</a></i> is torpedoed and sunk by <i id="mweg"><a href="https://en.wikipedia.org/wiki/SM_UB-123" id="mwew" rel="mw:WikiLink" title="SM UB-123">UB-123</a></i>, killing 564, the worst-ever on the <a href="https://en.wikipedia.org/wiki/Irish_Sea" id="mwfA" rel="mw:WikiLink" title="Irish Sea">Irish Sea</a>.<sup about="#mwt39" class="mw-ref reference" data-mw='{"name":"ref","attrs":{"name":"RTE2018-10-10a"},"body":{"id":"mw-reference-text-cite_note-RTE2018-10-10a-5"}}' id="cite_ref-RTE2018-10-10a_5-0" rel="dc:references" typeof="mw:Extension/ref"><a href="./October_10#cite_note-RTE2018-10-10a-5" id="mwfQ" style="counter-reset: mw-Ref 5;"><span class="mw-reflink-text" id="mwfg">[5]</span></a></sup><sup about="#mwt43" class="mw-ref reference" data-mw='{"name":"ref","attrs":{"name":"RTE2018-10-10b"},"body":{"id":"mw-reference-text-cite_note-RTE2018-10-10b-6"}}' id="cite_ref-RTE2018-10-10b_6-0" rel="dc:references" typeof="mw:Extension/ref"><a href="./October_10#cite_note-RTE2018-10-10b-6" id="mwfw" style="counter-reset: mw-Ref 6;"><span class="mw-reflink-text" id="mwgA">[6]</span></a></sup>