Chittim = Cyprus, or some European power. See note on Num_24:24. Reference to Pentateuch (Num_24:24). App-92.
against the holy covenant. Made with the Jews at the beginning of the last seven years, already mentioned in Dan_9:27. in Dan_11:28, he had already plotted the breaking of it.
do = do [so], or accomplish [it]: i.e. he will break it.
holy. See note on Exo_3:5.
have intelligence = fix his attention on (with a view to co-operation).