נחום ב:ד פירוש: רש״י

The shields of his mighty men—The mighty of Nebuchadnezzar, who lay siege to Assyria.

are dyed red—They are dyed red, and the men of their army are in crimson, dressed in crimson.

the chariots are in the fire of torches on the day of his preparation Heb. פְּלָדֹת. On the day that he [Nebuchadnezzar] is prepared to go out in the army, he polishes his iron chariots, but I do not know what פְּלָדֹת means. I say that it is a material that polishes iron well. And some interpret פְּלָדֹת as an expression of a fiery torch (לַפִּיד), by transposing the letters.