"Born in the nebula known as M78, together they fight for peace and justice throughout the galaxy. Warriors of great compassion and courage"
- ―Opening narration, Mega Monster Battle: Ultra Galaxy Legends The Movie
The Inter Galactic Defense Force (宇宙警備隊 Uchū Keibitai) is a security organization originating from the Land of Light that seeks universal peace and justice. Out of the 18 billion Residents of the Land of Light, only 1 million are employed under the Inter Galactic Defense Force.
Thirty thousand years ago, the Land of Light was attacked by Alien Empera and his monster army in what would later be called the Great Ultra War. The most decorated hero of this conflict was Father of Ultra, who dueled and defeated the dark emperor. Father of Ultra, then known as Ken, was made the first captain of the Inter Galactic Defense Force. Other Ultras soon joined the organization for the sake of promoting peace in the universe.
Their numbers grew and eventually, the organization reached a million members strong. Ken was promoted to the position of Supreme Commander after the Great Ultra War and took on the title Father of Ultra. Among the Space Rangers are the Ultra Brothers, many of whom have become a legendary presence on Earth.
Ultraman Mebius has stated that prior to the creation of the Inter Galactic Defense Force, Ultras of the Land of Light believed their powers should be used to do good. This implies they enforced justice across space in a less organized fashion.
- All members of the Inter Galactic Defense Force are referred to as Ultra Warriors and/or Space Rangers.
- There are approximately one million Ultra Warriors.
- The duties of the Ultra Warriors include patrolling sectors of the universe, battling monsters, accident investigations and rescue operations.
- Due to their abilities, Ultra beings do not carry fire arms or use vehicles. However, the Ultra Bracelet seems to be a standard weapon, as several rangers have been seen using it.
- Cadets are trained in the use of beams as well as physical combat.
- The Silver Cross Corps is the medical division of the garrison. Unlike the other members they are not a combative force and only exist to heal injured and fallen Ultras.
- There is a branch of the Inter Galactic Defense Force in the Andromeda Galaxy.
- As mentioned in Ultraman Z and Ultraman Zero Voice Drama, Z was a student of the Inter Galactic Defense Force Academy. The classes he has attended include Space Meteorology, Ancient Space Literature, and Monster Ecology.
- Father of Ultra: The Supreme Commander of the Inter Galactic Defense Force.
- Mother of Ultra: The leader of the Silver Cross Corps.
- Ultra Brothers
- Ultraman Zero
- Ultraman Neos
- Ultraseven 21
- Ultraman Max
- Ultraman Xenon
- Ultra Force
- Ultraman Great
- Ultraman Powered
- Ultraman Taiga
- Ultraman Z