Details: Introduction And Convergence

I think that Poul Anderson's Technic History is unique among future history series in that characters and other details introduced gradually converge eventually. In the following summary, numbers represent instalments, e.g., 1 = "The Saturn Game." The details listed are significant later if not also at the time. 

1. A character who was raised in the Jerusalem Catholic Church.

2. Ythrians as a species but not yet as individuals.

3. An Ythrian family of the New Faith interacting with Aenean human beings on the planet that will be Avalon.

4. Nicholas van Rijn, the Polesotechnic League and Earth in the Solar Commonwealth.

5. The Wodenite Adzel and domestic life on Earth in the Commonwealth.

6. The Hermetian David Falkayn on Ivanhoe.

7. Falkayn working for van Rijn's company although he has not yet met van Rijn.

8. Later events on Ivanhoe.

9. Van Rijn on Diomedes with the future Duchess of Hermes.

10. An Altaian describes his encounter with Baburites to van Rijn.

11. The captain of van Rijn's yacht is from Ramanujan.

12. Van Rijn with Joyce Davisson from Esperance.

13. Falkayn, Adzel and Chee Lan are van Rijn's first trade pioneer crew/trader team. Van Rijn cameos.

14. The trader team on Merseia. No mention of van Rijn.

15. Van Rijn back on Earth.

16. The trader team and van Rijn. A Ferran.

17. Other characters, one of whom quotes van Rijn.

It continues like that. There are twenty-six more instalments.

Addendum:

It is hard to stop thinking about this but also difficult to remember every detail that should be included in a brief summary.

18. Van Rijn, Coya Conyon and the trader team at Mirkheim.

19. Grand finale for the League characters, Mirkheim and the Baburites. Major events on Hermes.

20. Falkyan-led colonization of islands on Avalon.

21. Later colonization of a continent on Avalon. Ivar Holm.

22. References back to the Commonwealth and forward to the Terran Empire.

23. The Terran Empire.

24. The Terran-Ythrian War and its effects on Avalon where Tabitha Falkayn marries Christopher Holm, son of Daniel.

25. Dominic Flandry, defending the Empire from Merseia, meets Max Abrams and John Ridenour on Starkad and Brechdan Ironrede and Tachwyr on Merseia - and fathers a son although we do not know that yet. Some Starkadians will be evacuated.

26. Flandry meets Tachwyr again on Irumclaw.

27. Flandry defeats the Aenean Rebellion and expels rebels. A Ferran.

28. Ridenour on Freehold.

29. Chunderban Desai from Ramanujan and Aycharaych of Chereion are on Aeneas in the aftermath of the Rebellion.

30. Flandry on Scotha.

31. Flandry meets Aycharaych.

32-34. Flandry elsewhere.

35. Flandry saves Vixen and captures Aycharaych but loses him in a prisoner exchange. Chives.

36. A brief mission for Flandry and Chives.

37. Flandry meets Tachwyr and Aycharaych again, loses his son and bombards Chereion.

38. Flandry joins up with Max Abrams' daughter.

39. Flandry's daughter teams up with the son of a Starkadian evacuee and with a Wodenite Jerusalem Catholic priest who studies Chereionite inscriptions. This new team thwarts a Merseian plot that had originated with Brechdan and Ironrede, thus demoralizing Tachwyr.

40. The Empire has fallen.

41-42. Interstellar civilization is restored.

43. A New Vixenite contacts descendants of Aenean exiles.

This does not cover all the connections.