In the Star Sea Era, it was difficult to defend against surprise attacks, as a massive fleet could emerge at any location in the Star Sea, such as near your Capital Star.
To this day, large-scale spatial lockdown devices are still in the experimental stage, and major Star Nations continue to rely mainly on stockpiling heavy troops and joint defenses to protect their important planets.
For example, near the Capital Star of the Confederation, numerous military fortresses are built on nearby subsidiary planets. These are equipped with land-based cannons capable of directly bombarding the Star Sea and destroying main starships. Additionally, many larger-caliber floating orbital cannons are arranged in nearby orbits.
The garrison forces themselves are powerful. Moreover, two main fleets can arrive to provide support within an hour, and six main fleets can arrive within four hours.
