The Missile Silo is one aspect of Military Infrastructure.
The Missile Silo requires a total of five levels of Research: Capacitors, Transistors, Processors, Computing, and Missile Silo
The Missile Silo is required for the construction and operation of ICBM's.
Currently, neither the Missile Silo nor ICBM's are functional. After being researched, the Missile Silo does not appear for purchase under the Military Infrastructure tab.