Confederacy Alliance is a technology in Clone Campaigns that is unique to the Confederacy, and can be researched at the Spaceport in Tech Level 4. It costs 250 Food and 250 Nova, and gives Spaceports +500 Hit Points. In addition, it gives Cargo Hovercraft +25 Hit Points and +10% speed.
The increased sturdiness of Spaceports and Cargo Hovercraft is important if the player relies on trade, which is often a good idea when playing as the Confederacy.
"The Confederacy Alliance serves to increase the durability of its Spaceport as well as of its Cargo Hovercraft. Cargo Hovercraft are also made faster, and will be able to move 10 percent more quickly than before."