a duel
... that all charges against John S. Marmaduke for killing a fellow Confederate general in a duel were later dropped?
... that all charges against <a href="./John_S._Marmaduke" id="mwAdY" rel="mw:WikiLink" title="John S. Marmaduke">John S. Marmaduke</a> for killing a fellow Confederate general in <b id="mwAdc"><a href="./Marmaduke–Walker_duel" id="mwAdg" rel="mw:WikiLink" title="Marmaduke–Walker duel">a duel</a></b> were later dropped?