For WWI you can't go past ex-soldiers Ernst Jünger and Ernst Wiechert (though Wiechert hasn't made it into English yet, I think). I also like the Hornblower novels of C.S. Forester as a kid (would probably go well with Master & Commander, though I haven't read the latter). Recently I've been reading the Flashman novels which give a taste of the wars of the British in the 19th century in a rather hilarious way. For WWII I enjoyed Evelyn Waugh's Sword of Honour trilogy and one of my favourites of all time was (I haven't read it in thirty years, so it may not have held up) Alistair McLean's HMS Ulysses (essentially Moby Dick retold as the voyage of a British destroyer on the artic convoys to Russia).
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I also like the Hornblower novels of C.S. Forester as a kid (would probably go well with Master & Commander, though I haven't read the latter).
Recently I've been reading the Flashman novels which give a taste of the wars of the British in the 19th century in a rather hilarious way.
For WWII I enjoyed Evelyn Waugh's Sword of Honour trilogy and one of my favourites of all time was (I haven't read it in thirty years, so it may not have held up) Alistair McLean's HMS Ulysses (essentially Moby Dick retold as the voyage of a British destroyer on the artic convoys to Russia).