Bivouacked

from The Collaborative International Dictionary of English v.0.48

Bivouac \Biv"ouac\, v. i. [imp. & p. p. {Bivouacked} (?); p. pr.
   & vb. n. {Bivouacking}.] (Mil.)
   (a) To watch at night or be on guard, as a whole army.
   (b) To encamp for the night without tents or covering.
       [1913 Webster]