The Global Defence Force (GDF) is an organisation that was set up by the World Council to enforce law and order against those who seek to destroy or disrupt the current peace and prosperity of the people of Earth. They work with the Council and independently to achieve this task by providing protection for the world's iridium stores (Up from the Depths Part 2) to organising highly elaborate undercover operations to catch criminals (Undercover).
The head of the organisation is Colonel Casey, who not only manages and runs the entire force, she also works with International Rescue and its operatives when the situation calls for it - she has recruited the skills of Parker to break into a vault to rescue a scientist (The Hexpert) as well as for their undercover operation (Undercover). There are times however they do get in the way of a rescue attempt by International Rescue (Earthbreaker) and occasions where they have called the Tracys to offer them assistance (Chain Of Command and Up from the Depths Part 2).

GDF Headquarters
They have outposts around the globe and even in space. The GDF satellite Global One is commanded by Captain Ridley O'Bannon and run by her crew. The satellite became damaged not long after its launch by rogue asteroid brought towards earth by one Langstrom Fischler (Impact). One objective by the space arm of the organisation is to check on old derelict spacecraft to make sure they are safe from causing any problems to interstellar craft from their debris, and to protect the old vessels from pirates and illegal scrap metal dealers (Ghost Ship).
Besides Global One, the GDF mainly rely on their fleet of armoured cars and quadjet flyers for mobility, and utilise advanced technology to achieve their aims.
Appearances[]
- Main article: /Appearances
Emblem[]
The GDF emblem consists of a shield adorned with wings on either side, with three 4-pointed stars in the top line of each. The centre of the shield has an image of a globe (though with no countries on it) with five 4-pointed stars above it, and a downward triangle at the bottom. The colours for the emblem are light blue, grey and white.
GDF Uniform[]
The GDF has several different uniform types, ranging from the green and brown standard military issue of frontline forces, to the dark and light grey uniforms of the higher chain of command. The only clear indication of rank is generally between standard personnel and the top brass; however, between those at the top, there's no clear distinction as the uniforms vary in style.
Though the GDF primarily uses army, marine corps and certain air force and police service ranks, such as Colonel, Captain and Lieutenant (all of which are commissioned officers), it is unknown if they use navy ranks for aquatic operations, or Commonwealth-style air force ranks for air and space operations, or whether the whole force operates as an integrated force akin to the real-world Israeli Defence Forces, with no rank differentiations between branches of service. Furthermore, rank insignia for the force as a whole (officers, warrant officers, NCOs and enlisted) was never made visible at any point in the show. Nor was any operational structure or rank structure clearly seen.
GDF Machines[]
The GDF Flyer (Quadjet) and the GDF Armoured Cars are mainstay means of travel for the Global Defence Force. All units that ride in these craft are under the command of Colonel Casey.
Global One[]
Global One is a space satellite owned by the GDF to monitor and conduct interstellar operations. The crew is under the command of Captain O'Bannon.
Trivia[]
- GDF Headquarters is guarded by two GDF armoured cars with radar or communication dishes.