I forgot to include last night the website for the "shot at dawn" campaign in the UK. You can go there by clicking here. Curiously, when you visit the Commonwealth War Cemeteries on the western front, you can read in the guidebooks that such-and-such cemetery has "shot at dawn" burials, often even telling you where they are located. They lie alongside their comrades with no indication of their fate.
That's in its own way a moment of grace--but no one back home could miss the fact that a given individual's name failed to appear on the local war memorial.