If I'm correct, the main idea is that everyone is equal, but what do I know...
Answer:
According to the drummer boy, the soldiers are murmuring " Me, I’m the one, I’m the one of all the rest won’t die. I’ll live through it. I’ll go home. The band will play. And I’ll be there to hear it."
Explanation:
Copied straight from the drummer boy of Shiloh:
"What the men whispered the boy could only guess, and he guessed that it
was: Me, I’m the one, I’m the one of all the rest won’t die. I’ll live through it.
I’ll go home. The band will play. And I’ll be there to hear it."
So, you may understand what is being read or said aloud.