THE BLADE IS LIKE THE BLADE ON THE MOROCCAN NIMCHA PICTURED WITH ITS SCABBARD , IN THE NEXT PICTURE ABOVE THIS POST. THE BROKEN BLADE LENGTH IS GOOD FOR A DAGGER OR BAYONET. THE MODIFICATIONS TO THE GUARD ARE UNKNOWN BUT PERHAPS MIGHT BE FOR ATTACHING AS A BAYONET.
THE HORN MAY BE RHINO AND MAY HAVE BEEN MODIFIED OR JUST SHOWING DETERIORATION AND DAMAGED.
IF IT WAS EVER MODIFIED AS A BAYONET IT HAS COME APART SINCE THEN AND PERHAPS THERE ARE PARTS MISSING. THATS MY BEST GUESS