Lstar
From Supremacy Wiki
L-Stars
L-Stars are satellites that are created to shoot down warheads.
L-Stars can be made in the build phase once a Superpower has achived the necessary technology level, for 1000 and 2 minerals each.
When in combat, an extra die will be awarded to the Superpower that has the most L-Stars.
They have two modes, Blanket defence (default) and Specific defence, which are set in the L-Star protected territories screen. Onces L-Stars have been set to defend, they will automatically attempt to shoot down any warhead that is fired.
L-Stars can be destroyed by a space blast attack.