John Gill Commentary Jeremiah 50:37

"A sword is upon their horses, and upon their chariots, and upon all the mingled people that are in the midst of her; and they shall become as women: a sword is upon her treasures, and they shall be robbed." — Jeremiah 50:37 (ASV)

A sword [is] upon their horses, and upon their chariots
Upon the horsemen, and those that rode in chariots; upon the whole cavalry, which should fall into the enemies' hands, and be cut to pieces; see (Revelation 19:18) ;

and upon all the mingled people that [are] in the midst of her ;
those of other nations that sojourned in Babylon, or came thither for merchandise; the word having, as Kimchi observes, such a signification; or rather her auxiliaries, troops consisting of other people that were her allies, or in her pay and service:

and they shall become as women ;
timorous, faint hearted, quite dispirited, unable to act, or defend themselves:

a sword [is] upon her treasures, and they shall be robbed ;
or they that slay with the sword, as the Targum, the soldiers, shall seize upon her treasures, and plunder them: thus should she be exhausted of men and money, and become utterly desolate.