Dr. Jurgen of DC developed a global defense system to combat potential alien threats. This system has two elements. First is the VTX-001 Vartoul unmanned anti alien PT. Governing these drones is the ODE worldwide network system. However, this system has a noteworthy secret. A living human is needed to control the ODE core. Furthermore, the ODE core needs human organs to support itself. At the present day, the drone have gone on a mass abduction spree. Kyosuke and co has been sent in to take care of the problem.

[Source: Anime News Network]

It is two hundred years after the beginning of the Space Era, when human civilization on Earth began expanding into space. However, by the start of the 21st century, two meteors struck the planet, sending humanity into chaos. By the year 179 of the Space Era, secret technology, dubbed Extra-Over Technology, or EOT, was discovered by the Earth Federal Government within a third meteor that hit Earth in the Marquesas Islands of the South Pacific. Dr. Bian Zoldark, head of the EOTI Institute (Extra-Over Technological Investigative Institute), had evidence the creators of the EOT were heading to Earth, in order to reclaim it...or worse, invade the planet. In order to defend humanity from extraterrestrial threats, the government begins to research and develop humanoid mecha called Personal Troopers.

[Source: Anime News Network]

This is considered episode 26 of the series which was only included on the final DVD. It primarily focuses on the aftermath of the final TV episode (25).

With many of its central personnel lost in the war, the Earth Federation Government is forced to rebuild, and Brian Midcrid, president of the Unified Colonies, takes the position of its president. During an emergency session of the Federation Diet, he publicly acknowledges the existence of extraterrestrials, and reveals the events of the L5 campaign to the masses in what will later come to be called the "Tokyo Declaration." He goes on to state that these aliens pose a serious threat to humanity.

[Source: Crunchyroll]