Intermediate-range ballistic missile

An intermediate-range ballistic missile (IRBM) is essentially an intercontinental ballistic missile with a reduced range. IRBMs are not commonly used, due to the advancing technology prevalent in ICBMs.

The only known use of an IRBM was during the Usean Corporate War, where Nemo and Keith Bryan destroyed a Neucom IRBM base in the Amber Mountains. If the base wasn't destroyed in enough time, Neucom launched a single IRBM with an unknown target, which Nemo promptly destroyed.

Trivia

 * Even though the Usean Corporate War was a simulation, the fact that Neucom, a large corporation, could have been in possession of at least one IRBM in 2040 is quite strange considering the usage of ICBMs during both the Usean Continental War and the Second Usean Continental War.