Ronald Cuthbert Hay
... that Second World War aviator Ronald Cuthbert Hay is the only Royal Marine fighter ace?
... that <a href="./World_War_II" id="mwGIc" rel="mw:WikiLink" title="World War II">Second World War</a> <a class="mw-redirect" href="./Aviator" id="mwGIg" rel="mw:WikiLink" title="Aviator">aviator</a> <b id="mwGIk"><a href="./Ronald_Cuthbert_Hay" id="mwGIo" rel="mw:WikiLink" title="Ronald Cuthbert Hay">Ronald Cuthbert Hay</a></b> is the only <a class="mw-redirect" href="./Royal_Marine" id="mwGIs" rel="mw:WikiLink" title="Royal Marine">Royal Marine</a> <a class="mw-redirect" href="./Fighter_ace" id="mwGIw" rel="mw:WikiLink" title="Fighter ace">fighter ace</a>?