The Guardian Units of Nations, commonly shortened as GUN, is a major interplanetary military and law enforcement organization in both Adventures in Mobius and the Sonic the Hedgehog series.
It is said that they were created 50 years prior to the events of Sonic Adventure 2. They were known for mistakenly capturing Sonic the Hedgehog and ending Project Shadow.
Annexation of Cocoa Island
Due to scanners and satelites detecting a massive energy surge from under the Island, GUN was sent to annex and excavate the Island so that they "can secure the power and deliver it back to the United Federations heartland. They were also sent to protect the "power" from their enemies, such as the Eggman Empire, and even their allies, such as the Kingdom of Acorn. If GUN couldn't retrieve the "power", they will have no choice but to destroy Cocoa Island entirely.
Due to there being millions of members in GUN's ranks. This list has been narrowed to the most notable members known:
Base of Operations
The standard GUN uniform are sky blue shirts and pants alongside with a black vest and black boots. They sport a black helmet with black visors that all members have on and the GUN symbol on their shoulder-pads and on their helmet. The Desert Brigade has simular clothing but mostly tan, the color of sand. Elite Officers also have simular clothing but their shirts and pants are red and their visors have an editional 2 lens on each main len.