This is the first chapter of the saga.
Command & Conquer is set in the latter half of the 1990s and early 21st century, after a meteorite crash lands near the river Tiber in Italy. The meteorite introduces an alien substance to the world dubbed Tiberium, which becomes of unprecedented value due to its unique property of rapidly leaching minerals and nutrients from the surrounding soil and crystallising them, emitting highly toxic gases in the process.
An authoritarian, ancient and quasi-religious secret society known as the Brotherhood of Nod proves to somehow have foreseen the potential that this substance would come to represent, and reveals itself to have been investing in the development of technology to harvest the Tiberium crystals ahead of the world's established scientific communities. They soon control almost half of what has become the most valuable commodity on the global trade markets, and use these assets to sustain a growing army of followers and converts worldwide under the leadership of a mysterious and charismatic figure, who is known only as Kane.
Following a series of relentless bombings across the world, culminating in the destruction of the fictional Grain Trade Center in Vienna, a wave of mass panic and fear sweeps the globe. These acts are ultimately attributed to Nod terrorists, and their leader Kane. The United Nations Security Council realizes that Nod has plans for world domination, and sanctions the G7's Global Defense Initiative task force to intervene and put a halt to the Brotherhood's progress on its behalf, inadvertently setting a conflict in motion that will escalate into a modern world war.