Mauritanian National Union
... that leaders of the pro-Mali Federation Mauritanian National Union were released from jail once the Federation fell apart?
... that leaders of the pro-<a href="./Mali_Federation" id="mwAjk" rel="mw:WikiLink" title="Mali Federation">Mali Federation</a> <b id="mwAjo"><a href="./Mauritanian_National_Union" id="mwAjs" rel="mw:WikiLink" title="Mauritanian National Union">Mauritanian National Union</a></b> were released from jail once the Federation fell apart?