The lover sets the banner of love over his beloved (2:4), and then the bride declares that her lover is a banner prominent among ten thousand (5:10). Both use military imagery; the banner is a military standard.
But then the imagery works the other way, and the bride is bannered: as awesome as bannered ones” (6:4). The bride shares in all that her lover has, and if he is a conqueror so is she.
Allegorize as you will.
