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Star Wars and Halo Species under the Rebel Alliance Banner

zabrak (the same species as Darth Maul)

Sangheili (for the Rebel Alliance)

Humans (Like Captain Rex)

Wookiee (like Chewbacca.) [the original inspiration of the Halo Brutes.]

lMon Calamari

Twi'leks

Ewoks (on the Planet Endor)

(They may be cute but are extremely dangerous for any unfortunate Stormtrooper trying to survive a night on Endor.)

Talz (slightly bigger in a Normal Halo Brute and is a little stronger than a normal brute is can miss some Stormtroopers up.)

Rodians

Selonians (otter humanoid like species.)

Lepis (like Lop)

(Later would help give rise to the S.H.R or Sanghelios Republic and the New Republic.)

Ships under the Rebel Alliance:

Dauntless-class heavy cruiser

Liberator-class cruiser (Star Wars: Legends only)

Dreadnaught-class heavy cruiser
(Star Wars: Legends only)

EF76 Nebulon-B escort frigate

Assault Frigate Mark I

CC-9600 frigate

CCS-class Battlecruiser (halo)

SDV-Class Heavy Corvette (halo)