ICBM

Overview
The ICBM is a unit originated in the first game, The Conquerors, that was reworked and became the Nuclear Missile in TC3. Both the Nuke and the ICBM are exactly the same, except for the way the damage is done. However, Radiation Centers can be built around a base to protect nearby friendly units and buildings from ICBM strikes, this feature was probably replaced by the ability to garrison units, even if it's much more practical to just move your units away.

Usage
As already stated in the overview section, this unit works the exact same way as the Nuke, except for a few things related to its damage and production. Since research works in a totally different way in the past games of the series, Silos can't be built before the 60 minutes mark and takes around the same time to build in both games.

For the actual usage of a Nuke and for tips on how to do it right, head to the Nuclear Missile page.

Trivia

 * ICBM stands for intercontinental ballistic missile.
 * Despite the popular belief and mistake, the "M" in "ICBM" stands for Missile, which means that saying "the ICBM Missile" is wrong, a mistake that is even in the game.
 * Even if it's one-use only, this unit is the strongest throughout all games, having up to 2000 HP at max. This was made to counter buildings such as the Railgun Cannon and other end-game buildings/units that do massive damage.
 * On the contrary to popular belief, anti-air turrets cannot be used to counter an ICBM since it doesn't count as a soldier or as an actual unit.