I love this. It seems such a minor thing, and they don’t do a flashback to it, and it’s not at all a part of Harry’s character to play with soldiers or figurines, but if you remember this small moment, It’s like the entire story, just rushes at you all at once. His childhood, and ours changed forever, and this soldier is a glimpse of the beginning before we even knew what was in store. FEEEEELS!
I particularly like the metaphorical resonance of the one standing soldier surrounded by the fallen soldiers in the second image.