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bivouaced >> bivouacked
Annotation: The well-attested (especially in military accounts--likely the word's most frequent context) spelling bivouaced, which I favor, is not sanctioned by contemporary (2013) lexicographers; but I suspect few of them have slept out in the rain. The needless (and ugly) k (a hopeless stab at phoneticization of English spelling) is helpful only to those unacquainted with the word bivouac. Ammunition for k lovers is afforded by the attestation of any number of peculiar spellings from the early (vagarious orthography) days of Modern English. A point against that argument is that bivouac, in spite of its ancient Germanic roots, appears in English only in the last couple of hundred years.
