In the dark you couldn't see which flag was displayed over the port. You had to wait until daylight to see if Old Glory was still waving or if it had been replaced by the Union Jack. How excruciating! All that death and dying and exhausting labor, and not knowing if, in the end, you would lose. Or win.
Seems like a metaphor for life in this body. I know that the end of the story has a glorious victory for all of us. We will smile like cheshire cats at each other and praise the Lamb for what His sacrifice accomplished. But in this life, while still in this body, we can struggle to overcome. We can labor and fight the dark. And lose. Or win.