Rashi on Isaiah
Behold the land of the Chaldees, this people has never been It was not to be a people, for they are called, (Habakkuk 1:6) “bitter, impetuous nation.” They are a foolish nation, of the creatures that the Holy One, blessed be He, (so to speak,) regrets (creating) them. [Tractate Sukkah (52b)].
Rashi on Isaiah
Assyria established it to station his fleets therein, his ships, huge battle ships, as (infra 33:21): “A mighty fleet (צִי).”