Many missiles in Supreme Ruler are treated as units in their own rights. The reason for this is that some units’ ability to survive missile attacks is based less on their own defense and attack capabilities than on the units that support it. The general rule applied is that if a missile is likely to be engaged in flight, either by ballistic or missile counter fire, then it is treated as a unit. By this rule air to air missiles are part of the attack values of the aircraft but most anti ship missiles are their own type of units.
Some of the concepts related to the missile unit system;
Missile points capacity • Missile points value • Missile launch types • Missile attack types • Weapons of Mass Destruction