Is a manga which Miyazaki wrote for a newspaper targeted for children. It is more of a graphic novel than a manga, since most of the text are written outside of the frames and there are very few dialogue bubbles (though towards the end of the story, it moved closer to the traditional manga style).
The surprisingly dark story deals with the devastation of war, betrayal, and the ugliness of the human nature under desperate situations, including deaths of several characters. One can see the influence of TEZUKA Osamu in the art style of this manga (as in most of the manga written in this time).