during the Siegfried Line campaign
... that ducks frequently carried more than two and a half tons during the Siegfried Line campaign?
... that <a href="./DUKW" id="mwBP8" rel="mw:WikiLink" title="DUKW">ducks</a> frequently carried more than two and a half tons <b id="mwBQA"><a href="./American_transportation_in_the_Siegfried_Line_campaign" id="mwBQE" rel="mw:WikiLink" title="American transportation in the Siegfried Line campaign">during the Siegfried Line campaign</a></b>?