Let's take a closer look at the Power graph:
Using this and the other graphs / score changes, we now know exactly what the Gladiator's have been up to:
T00 - Settled cap with 8 land tiles, 1 water tile
T05 - Capital borders pop to second ring, add 9 more land tiles, 3 water tiles
T15 - Completed Worker, started Warrior
T18 - Finished their first tech, probably Agri
T22 - Cap grew to size 2
T24 - Finished their second tech, Hunting
T26 - Finished their first Warrior, Cap grew to size 3
T27 - Finished their third tech, BW
T28 - Cap grew to size 4, revolt to Slavery
Using this and the other graphs / score changes, we now know exactly what the Gladiator's have been up to:
T00 - Settled cap with 8 land tiles, 1 water tile
T05 - Capital borders pop to second ring, add 9 more land tiles, 3 water tiles
T15 - Completed Worker, started Warrior
T18 - Finished their first tech, probably Agri
T22 - Cap grew to size 2
T24 - Finished their second tech, Hunting
T26 - Finished their first Warrior, Cap grew to size 3
T27 - Finished their third tech, BW
T28 - Cap grew to size 4, revolt to Slavery