Jurassic World: Dominion Dominates Fandom Wikis - The Loop
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Gladius (Research) was available in Closed beta, but does not exist in the VIP version of the game. The article is being kept for historic purposes. The VIP version of Gladius (Research) can be found here.
Researching Gladius enables a fast unit called Gladius. These are one of the 3 infantry units unlocked in the Classical Age.