bushment

noun3

1. •
   (no longer used) An ambush.
2. •
   (no longer used) The troops concealed in an ambush.
3. •
   (no longer used) A surprise party; a company of soldiers secretly deployed.

   • The first day of August a bushement of Frenchemen came to the cawsey but a myle and halfe out of Caleys, where they brenned howses, toke many men prisonars, droffe away horses […]. — 1541