Really spectacular. Your writing is solid, your cadence smooth. The descriptions are succinct, but sufficient to place the reader right there next to the two soldiers. I also really liked that Isaiah answered "No" to the trooper's last question, because in a very real way, Isaiah was no longer that person, and was far enough removed from him to feel him a stranger.
The only criticism I might offer is that the story Isaiah shared seems a bit disconnected from the plight of the HDF trooper, but that's probably more on me than on you. Also, there were a few technical issues (a few bits of missing punctuation, mostly), but that's easily chalked up to the constraints of the jam.
Overall, one of the best pieces I've read for the jam (and at this point I've read all but a handful). Very well done!