Pickett-Hamilton fort
... that a Pickett-Hamilton fort could be lowered into the ground when not in use and raised for combat?
... that a <b id="mwBF4"><a href="./Pickett-Hamilton_fort" id="mwBF8" rel="mw:WikiLink" title="Pickett-Hamilton fort">Pickett-Hamilton fort</a></b> <i id="mwBGA">(example pictured)</i> could be lowered into the ground when not in use and raised for combat?