Identical with the Prince who confirms the covenant in ch. 9:25-27 (see ch. 8:11). That this was the Messiah, Jesus Christ, is clear from the prophecy of ch. 9. It was when Tiberius reigned (A.D. 14-37), and upon the order of his procurator of Judea, Pontius Pilate, that Jesus was crucified, in the year A.D. 31.
Arms of a flood.
“Arms” denotes power, and here, particularly, military power (see vs. 6, 15). The picture is evidently that of floodlike armies of soldiers (see ch. 9:26). Tiberius was eminently successful in leading several military campaigns, both in Germany and in the East on the frontiers of Armenia and Parthia.