וּבָ֨אוּ ב֜וֹ צִיִּ֤ים כִּתִּים֙ וְנִכְאָ֔ה וְשָׁ֛ב וְזָעַ֥ם עַל־בְּרִֽית־ק֖וֹדֶשׁ וְעָשָׂ֑ה וְשָׁ֣ב וְיָבֵ֔ן עַל־עֹזְבֵ֖י בְּרִ֥ית קֹֽדֶשׁ׃
For ships of Kittim shall come against him, and he shall be cowed, and he shall return, and have indignation against the holy covenant, and shall do his pleasure; and he shall return, and have regard unto them that forsake the holy covenant.
Rashi on Daniel
Kittites Romans, troops from the kingdom of Rome who will rebel against him.