Hello Ethan,

From Donald McKinney's Integrated Timeline:

CT Supplement 10 page 4:  -2431 (3I Calendar): Terrans develop J1 drive used for in system jumps.

CT Alien Module 6 page 4:  -2408 to -2400 (3I Calendar): First Interstellar War breaks out.

MT Referee's Companion page 34: -2398 (3I Calendar): Terrans develop J2 drive

CT Alien Module 6 page 5: Ninth Interstellar War Terran Invention of J3 date given per GT Rim of Fire page 49 is -2276

Tom Rux

On October 6, 2019 at 12:55 PM Ethan McKinney <xxxxxx@gmail.com> wrote:

From 3I history, max jump distance is strictly limited by Tech Level. At the time of the First Interstellar War, the Ziru Sirka (First Imperium) and the Solomani Confederation were strictly limited to Jump-2. Cramming big jump drives into small ships just didn't matter.

The Terran development of the J-3 drive was one of the daggers in the heart of the First Imperium.