Star Trek has a long history in universe and many parts of it are not fleshed out. The "Lost Era" refers to the time between the ending of the Motion Picture era films and the start of The Next Generation, making up the dates of 2293 to 2364. A lot happened in this time, but it's mostly unexplored so with the Section 31 film being set to take place in this era, let's take a look at what we know of it with 8 things from this time.

Chapters
00:00 Introduction
00:53 Enterprise(s)
01:33 John Harriman
02:51 Tomed Incident
04:03 Enterprise B
05:12 Who Else?
06:20 Enterprise C
07:56 Tech of the Time
09:00 Style
10:47 Starships
11:36 Summary

Star Trek Online developed by Cryptic Studios and Perfect World.
Star Trek Picard/Strange New Worlds/Lower Decks/Enterprise/Voyager/Deep Space Nine/Discovery and The Next Generation are all owned by Paramount Pictures/CBS and distributed by CBS and Paramount Plus.
This Video is for critical purposes with commentary.

Outro Animation made by @icarogabriel17