Maratha Ditch
...that the Maratha Ditch was excavated around Calcutta, India, as a protection against attacks by Marathas, who, however, never attacked?
...that the <b id="mwFa0"><a href="./Maratha_Ditch" id="mwFa4" rel="mw:WikiLink" title="Maratha Ditch">Maratha Ditch</a></b> was excavated around <a class="mw-redirect" href="./Calcutta" id="mwFa8" rel="mw:WikiLink" title="Calcutta">Calcutta</a>, <a href="./India" id="mwFbA" rel="mw:WikiLink" title="India">India</a>, as a protection against attacks by <a class="mw-redirect" href="./Marathas" id="mwFbE" rel="mw:WikiLink" title="Marathas">Marathas</a>, who, however, never attacked?