War against the Atlas Corporation

The War against the Atlas Corporation  is an ongoing military conflict that occurs during the events of Call of Duty: Advanced Warfare. It is featured in every campaign mission from Collapse onward and is fought between the Atlas Corporation and virtually every country in the world.

Background
On June 15th, 2060, Jonathan Irons was admitted as the first CEO of a private corporation to become a member of the United Nations Security Council. Upon accepting his seat, he took the opportunity to address the allegations circulating that his company, Atlas, was manufacturing biological weapons of mass destruction that could target and eliminate people with specific genotypes. He openly admitted that no such weapons were being developed because they had already been developed.

Irons then goes on to say that the United Nations is an age-old relic from a different time when the nations of the world actually had the ability to come together and collectively solve the world's problems, but not anymore, as most, if not all, of the countries had outsourced the handling of such things to Atlas and him. He has sent his men and women to die in countless foreign wars, which he believes have never worked, nor will they now or ever.

He decides the time is right for Atlas to take control of the situation from the world's politicians, because Irons claims that politicians have no clue how to solve problems. If there is no one left to challenge Atlas as the sole military power on the planet, then the world will finally know peace. Irons' last words to the United Nations are that he intends to solve the world's problems and, as a resounding declaration of war to every nation's government in the world, that he intends to start with them.

Attack on San Francisco
Irons' first target was the United States, specifically the Navy's Third Fleet, currently stationed in San Francisco Bay. Irons holds a particular grudge against the United States, as he believes they have kept the world in a state of perpetual war for over a century now. He also points out the belligerence in their foreign policy, stating that the United States military intervention in other nations has only led to more wars, not resolution or peace. He believes the sole reason that the United States has set the global agenda for as long as it did was because they possessed the most advanced, sophisticated military on the planet, to which Irons disagrees. He claims that his actions, rather than perpetuating another global conflict, would bring about an end to all warfare.

That same day, June 15th, Sentinel operatives Jack Mitchell and Gideon, with assistance from local San Francisco Police Department, are in pursuit of a white van presumed to threaten the Third Fleet. Upon reaching the Golden Gate Bridge, Mitchell and Gideon and are halted and engaged by vehicles containing dozens of Atlas contractors. Sentinel and SFPD manage to eliminate Atlas forces and secure the target van halfway across the bridge. As Mitchell approached the van, the back doors open, revealing a swarm of drones that affix themselves to the bridge's cables and self-destruct, causing the entire Golden Gate Bridge to collapse into the San Francisco Bay and onto one of the fleet's carriers, disabling it.

Hundreds of Atlas forces then begin to surround and board the downed carrier; their objective, to secure the carrier's Arclight railguns. Only Mitchell and Gideon, now joined by Cormack and Knox, and a handful of Navy personnel are left to fend off the Atlas attack. Mitchell manages to plant jammers on the carrier's railguns, preventing Atlas any use of them. Sentinel then pushes on through the ship until they eventually reach the control room. Mitchell assumes control of the railguns, shooting down enemy Warbird VTOLs and cargo ships. After a period of time, Atlas gives up the attack and retreats, sparing the rest of the Third Fleet.

With thousands of dead Americans on Irons' hands, a dejected but vengeful Cormack states that their next objective is to "hunt him down...and [we] bury him."

"Free World" War Emerges
Sometime after the attack on San Francisco, the rest of the world responded with a declaration of war against the Atlas Corporation and Jonathan Irons, who had entrenched himself inside the Atlas Command Center in New Baghdad, Iraq.

Battle of New Baghdad
On January 8th, 2061, a shock and awe campaign commenced on New Baghdad, carried out by Sentinel and the U.S. 37th Airborne. Piloting F-52B fighter jets, Sentinel operatives Mitchell, Cormack, Gideon, and Knox fly through a large, winding canyon, engaging Atlas fighters and ground forces. As they exit the canyon on the outskirts of New Baghdad, Sentinel activate their cockpit drop pods, which guide them to the inner city.

They rendevous with Ilona and U.S. forces within the city, but are pinned down by Atlas MD turrets; Mitchell manages to either destroy the turrets or incapacitate their users. Atlas then deploys reinforcements and three A.S.T.s to assist the besieged Atlas defenders. After dealing with the A.S.T.s, at least two Titans approach Sentinel's position. As Ilona, Gideon, and Knox lay down suppressive fire, Mitchell is tasked with grabbing a nearby Stinger and eliminate the Titans.

Before Mitchell can act, hundreds of drones swarm Sentinel forces and detonate, releasing a thick cloud of Manticore. The gaseous weapon immediately kills anyone whose DNA is not programmed into the Atlas database, including Knox. Mitchell, Ilona, and Gideon are spared as they were former Atlas contractors.

An A.S.T. appears and fires upon the trio, wounding Gideon and knocking Mitchell and Ilona unconscious. Irons then appears on a large screen on the facade of a skyscraper, propagating to the citizens of New Baghdad that their enemies have fallen and victory is nearly theirs. Atlas troops then drag Mitchell, Ilona, and Gideon into the back of an Atlas vehicle.