Speaking of the Planetary Defense Council, we have to mention the series of ETO intelligence reports obtained by the United Nations after it designed Operation Guzheng to attack Judgment Day.
In 2007 of this Earth Plane world, the United Nations learned of the existence of the Trisolaran civilization while cracking down on the Earth terrorist organization known as the Three Body Organization, or ETO.
Then, by deciphering communications between the Earth-Trisolaris Organization and the Trisolaran civilization, the United Nations learned for the first time that the sophons had reached Earth and locked down humanity's basic scientific research. It learned that the sophons were monitoring humanity in every possible way, and discovered the terrifying truth that a thousand-strong Trisolaran space fleet was heading for the Solar System!
And so, the Crisis Era arrived, and humanity began to panic...
But this also brought the governments of every country together as never before. Under the United Nations, Earth established the Planetary Defense Council, or PDC, to research countermeasures and handle everything related to the Trisolaran invasion. Then the Crisis Era officially began, the space forces of various nations and continents were established one after another, and plans like the Staircase Program and the Wallfacer Project began to move forward or were put into action.
In short!
Although humanity still had plenty of internal conflicts and infighting during this period, its unity and efficiency on matters involving the Trisolarans were plain to see!
As it happened...
That very night, Annie was safely escorted by several armed helicopters and hundreds of security personnel from the Earth Defense Security Department under the PDC to a villa in a garden estate nestled deep in the mountains, hundreds of kilometers from N City. The surrounding military base protected it, and it was effectively cut off from most outside