The Global Conflict of 2040 was, as the name suggests, a short lived world war that occurred 20 years prior to the events of Thunderbirds Are Go!. Not much is known about the war, not even what started or ended it, but the events of it created a more peaceful and cooperative world, including the removal of all nuclear weapons in existence.
Relics from the war waiting to be discovered continue to exist, including functional weapons.
Episodes Referencing the WarEdit
In Space Race, a stealth mine orbiting the Earth is picked up by Thunderbird 3 during a space junk cleaning. Alan Tracy tries to survive against it throughout the entire episode. Brains claims that the mine was left over from the war. The fact that stealth mines created for use outside the Earth's atmosphere during the war would mean that various battles throughout it happened in space.