The Collaborative International Dictionary of English v.0.48:

Lancepesade \Lance`pe*sade"\, n. [F. lancepessade, lanspessade,
   anspessade, It. lancia spezzata a broken lance or demilance,
   a demilance roan, a light horseman, bodyguard.]
   An assistant to a corporal; a private performing the duties
   of a corporal; -- called also lance corporal. [Obsolete]
   [1913 Webster]