Melissa: Hello, sir. B.D.: Melissa! How's it going? Melissa: Good, sir, I've re-enlisted. I'm going back to the sandbox to work on choppers! B.D.: Oh. So you're making progress, then. Melissa: Yes, sir. You?
“Choppers” (helicopters) are very much frontline – she may very well be called to make that sacrifice! (But thanks for the Kipling quote – very appropriate.)