One user had shared a similar guide for British military few days ago. Haven't completed it. But it does seem promising. https://news.ycombinator.com/item?id=2

One user had shared a similar guide for British military few days ago. Haven't completed it. But it does seem promising. https://news.ycombinator.com/item?id=21663431 https://news.ycombinator.com/item?id=21663431