'Banners' in the Bible

We will rejoice in thy salvation, and in the name of our God we will set up our banners: the LORD fulfil all thy petitions.

Thou art beautiful, O my love, as Tirzah, comely as Jerusalem, terrible as an army with banners.

Who is she that looketh forth as the morning, fair as the moon, clear as the sun, and terrible as an army with banners?