I don't see any justification for calling this army 'FIDEs'. It doesn't use any FIDE pieces (except of course for the obligatory King and Pawns); and that the pieces have moves limited do slides, Knight leaps or King steps is true for many other armies as well. You could consider 'Forward Fighters' if you want to keep the alliteration, but in fact the qualification 'forward' is also a bit dubious; the Nutty Knights are more 'forwards' than this army.
I don't see any justification for calling this army 'FIDEs'. It doesn't use any FIDE pieces (except of course for the obligatory King and Pawns); and that the pieces have moves limited do slides, Knight leaps or King steps is true for many other armies as well. You could consider 'Forward Fighters' if you want to keep the alliteration, but in fact the qualification 'forward' is also a bit dubious; the Nutty Knights are more 'forwards' than this army.