Interplanetary ballistic missile

An interplanetary ballistic missile (IPBM) is a missile with a minimum range of 1 AU, primarily designed for high yield nuclear weapons delivery against interplanetary targets. These weapons are considered both prohibitively expensive and unnecessarily destructive, being equipped with 100 megaton thermonuclear warheads capable of levelling half a continent.
== History ==
In the aftermath of the Interplanetary War, the UEG and UNSC constructed seven IPBM launch sites at strategically viable locations on Earth, both as a last-ditch planetary defense system and a deterrent against a possible Koslovic/Frieden resurgence. However, as Magnetic Accelerator Cannons became commonplace the silos, and the missiles, were decomissioned, as MAC systems were cheaper to maintain and deploy while possessing equivalent firepower and being capable of high precision strikes, offsetting their shorter effective range in comparison to IPBMs.