combat a outrance

from The Collaborative International Dictionary of English v.0.48

Outrance \Ou`trance"\ ([=oo]`tr[aum]Ns"), n. [F. See
   {Outr['e]}.]
   The utmost or last extremity.
   [1913 Webster]

   {Combat a outrance}, a fight to the end, or to the death.

   Syn: fight to the finish.
        [1913 Webster]