Umhüllt Space Blockade

A Large Structure
The largest structure ever created in Earth's history before the Great Artificial Continent.

Design
It was a geosynchronous-defense-grid designed to keep travelers, and mainly military personnel, from going to and leaving Earth. This was ultimately to gain an advantage of control of Mars and it's inhabitants.

It was designed after the Kessler Syndrome problem during the "modern" human era (circa. 2050 - 2999), which kept Earth humans on Earth for many years and also led to the independence of Mars. After a couple centuries, the deadly dust surrounding Earth dissipated as it fell back down into Earth's atmosphere. This was done for the reason that Kessler Syndrome would be a major problem for Fringeria's plans.

After being constructed, it consisted of around one million house-sized space stations each interconnected to each other. Some stations weren't run by Fringer personnel, and were run by complexly coded computers. Each station had a similar computer to this and connected it's computing power to all stations in the network, acting as a sort of hive-mind. Each station possessed armament of several salvos of vacuum-based missiles.

Downfall
This structure fell short in it's disadvantages with blind-spots, to put it more accurately holes in it's defense. A guerrilla warfare squad put together after the Battle of Cape Canaveral which was given the mission to make a blind-spot in the structure. They did this by taking over the nearest station by disguising themselves as a small Fringerian Freighter, docking to the station, stealthily neutralizing all personnel inside without alerting the system, silencing the other stations around the stolen one, and letting a small fleet pass through. This led to the victory and alliance of Mars with Xlantia.

This meant the structure wasn't working, so Efsheeer demobilized the blockade and aimed his focus more on his surface ocean defense. He retaliated with sending a naval force to Hudson Bay in an effort to push Xlantian forces back south to their own capital cities.