Great detail is not necessary. Here would is the future of the past. It means was going to (and did).
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jooneyFrom the perspective of some past reference point, the time of a situation is future, but it is in past time when looking at it from the utterance time. That is how I understand this use of would.Yes. Primary reference (as usual) = the present; the moment of utterance. Secondary reference point = the past. Time indicated by "would" = after the second