Final answer:
The phrase 'sullen remnant retreating' conveys the demoralization of a remaining few soldiers after suffering heavy losses, retreating not in strategy but in defeat both physically and morally.
Step-by-step explanation:
The phrase "sullen remnant retreating" suggests that only a small portion of the original troops remains after a brutal and demoralizing battle. These survivors are not described as strategically retreating but are doing so in a dejected manner – sullen implies bad-tempered unwillingness, indicating that these soldiers are disheartened and possibly resentful due to their severe losses. Meaning there’s not just a physical but also a moral defeat. The phrase effectively evokes an atmosphere of despair and the idea that these troops, now a remnant, are pulling back with neither the will nor the means to continue the battle effectively.