Piper, H. Beam
Federation - a collection of related stories by H. Beam Piper. These are set in his TerroHuman Future History, but earlier in the sequence than the novels Four Day Planet and Space Viking.
(Preface by Jerry Pournelle)
These originally appeared from 1957 to 1962 in Astounding, Analog, and Galaxy. "When in the Course" is original to this collection - it also formed the seed for the "Lord Kalvan" stories.