Bombers

Bombers are delivery aircraft. They have an offense of 0 and a defense of 0.

Every Special Operation except Send SpyGuy needs bombers to deliver its payload. You must hold at least 500 bombers to launch one, and each launch uses up 500 of them, whether the operation succeeds or not. The Nuclear, Chemical and Biological Attacks on your own planet do not need bombers. If you are short, the Special Operations menu offers to buy the rest on the spot.

In a strike on another planet, your bombers fight the defender's jets. A strike with no bombers destroys none of them.

Bombers do nothing in an attack on your own planet. They add no strength to it, and they take casualties with the rest of the force, so sending them costs you bombers and buys you nothing. Hold them back and spend them on the attacks that need them.

Bombers add a large amount to your net worth.