The Mon Cala Royal Guard, alternatively called the Mon Calamari Guard, served as the personal troops of the Mon Calamari monarch. These guardsmen stood apart from regular Mon Calamari troopers due to the distinctive goggles they donned. During the Clone Wars, they operated under the leadership of Captain Gial Ackbar. A long-standing custom dictated that the monarch would engage in combat alongside their soldiers, a tradition upheld during the Battle of Mon Cala, where the Mon Calamari Guard spearheaded the assault, preceding Prince Lee-Char into battle. During an interrogation by Chief of Security Ghal Tarpfen aboard Starlight Beacon, subsequent to her capture by the Galactic Republic in the Battle of Galov, Tempest Runner Lourna Dee surmised that Tarpfen might have been a member of the Mon Calamari Royal Guard because of the manner in which she was seated. However, Dee was mistaken about the details: Tarpfen had previously held the rank of Captain Third Class within the Royal Guard before assuming the role of Head of Security on Starlight.
In Star Wars Legends, depictions of Mon Calamari military forces traditionally featured the use of antiquated weaponry, such as lances and shields, drawing parallels to Medieval knights.