"Execution" is a taut and engaging little story that shows an admirable grasp of the Astra Militarum and the mindset of a commissar. Driven by character and by an engaging cast, it is a story that plays on both the necessary evils of command and the common camaraderie of soldiers.
The Antari Rifles come across as a vital and dynamic regiment, little local touches keeping them feeling organic. The cultural heritage feels almost faux-celtic/hibernian, but with enough character to set it apart. The various unit designations and the snippets of history behind them truly add to the story. This is nicely contrasted with Raine, our main character, who remembers the contrast between her own upbringing and this more loamy grounded regiment she finds herself with.
The story itself splits between the tense rush of siege warfare, a ticking clock of reloading guns, and a more characterful moment between friends. For me it really drove home the conflict within Raine; the burden of her duty and her basic drives as a human being.
The characters of the regiment are memorable and feel as though they have their own distinct personalities, even as we see them almost only in passing. The sweep of the story feels like an introduction, like the beginning of a movie. In this regard, I hope that the author gets to return to them. More stories with these characters, playing on their interactions, friendships and rivalries would be a joy. I hope they get to turn up in a full length novel.
It's also good to see such a mix of character types and presentations. A good number of the cast, including the main character, are women. Of especial note is Zane, the sanctioned psyker, and Crys who takes an almost manic glee in demolitions. I also found myself desperate to know more about Captain Andren Fel and the slightly shady Daven Wyck. Again; sequels. Novel. Please.
All in all, Execution is a joy of a story. It's one that takes a simple premise and subverts it slightly. It's tense, taut and well-executed (pardon the pun) and bodes well for any further Astra Militarum stories from its author- who has previously cut their teeth on well-constructed Space Marine stories such as The Third War.