The Collaborative International Dictionary of English v.0.48:

Impressment \Im*press"ment\ ([i^]m*pr[e^]s"ment), n.
   The act of seizing for public use, or of impressing into
   public service; compulsion to serve; as, the impressment of
   provisions or of sailors.
   [1913 Webster]

         The great scandal of our naval service -- impressment
         -- died a protracted death.              --J. H.
                                                  Burton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

impressment
    n 1: the act of coercing someone into government service [syn:
         impress, impressment]

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "impressment":
   abduction, angary, annexation, annexure, attachment, call, call-up,
   collectivization, commandeering, communalization, communization,
   compulsory military service, confiscation, conscription, crimping,
   distraint, distress, draft, draft call, drafting, eminent domain,
   enlistment, enrollment, execution, expropriation, garnishment,
   impoundment, induction, kidnapping, levy, mobilization, muster,
   nationalization, press, recruiting, recruitment, right of angary,
   selective service, sequestration, shanghaiing, socialization,
   summons