You thought you knew all the characters in the Rogue One trailer, but you had no idea.

The first trailer for Rogue One: A Star Wars Story not only introduced the new heroes and villains in the galaxy far far away, but also gave fans a glimpse at new troopers and walkers, though you may have missed it. The latest episode of The Star Wars Show revealed the new poster for this summer’s Star Wars Celebration in Europe, which features three new characters. While you probably thought those four-legged vehicles storming the beach were AT-ATs, it turns out they’re a new brand of walkers: AT-ACTs, which stands for All Terrain Armored Cargo Transport. They look pretty similar to the original AT-ATs, but a little taller and more narrow with a yellow compartment on their sides.

The trailer also gave a few quick glimpses at some black troopers in the movie, often called “Shadowtroopers” online. Those are actually Death Troopers. Have a look at their costume designs featuring green-lit masks below:

The other new characters unveiled in the poster are another type of Empire forces, Shore Troopers. Check out the first official look at one below:

So far we know Rogue One: A Star Wars Story will follow Felicity Jones‘ Jyn Erso, a woman who rebels. She also leads a team of resistance fighters to steal the Death Star. The Gareth Edwards film will also star Diego Luna, Ben Mendelsohn, Donnie Yen, Forest Whitaker, Jiang Wen, Alan Tudyk, Riz Ahmed and Mads Mikkelson, who let it slip he’ll be playing Jyn’s father. Genevieve O’Reilly will also reprise her Revenge of the Sith character Mon Mothma. Check out the poster for Star Wars Celebration Europe below, which takes place in July. Rogue One: A Star Wars Story opens December 16.