The Tel Aviv War ravages the Middle East and disrupts oil supplies, triggering a global energy crisis.
Operation Sand Viper commenced, with a group of sixty Tier One Operators tasked to defend a civilian hospital and its occupants from a force of five hundred enemy fighters. The sixty men were cut down to fifteen, with one sent to escort the civilians to safety. The remaining fourteen men hid among their fallen brothers as the enemy drew closer, then quickly and viciously emerged from the sands, wiping out all but one of the enemy, who was left to wander the desert to spread word of what had occurred. The fourteen Tier 1 Operators earned the moniker "Ghosts," for their "menacing and unbeatable" methods, which the lone enemy survivor deemed "supernatural."
First World nations who relied primarily on Middle Eastern oil, like the United States, Russia, NATO, China, and India are crippled and attempt to maintain order, but are stretched thin.
Venezuela, Brazil, and Chile unite under one banner to form the Federation of the Americas, allowing them to monopolize their resources, consolidate power over their neighbors, and dominate the global energy market in the years to come.
General Diego Almagro, the leader of the Federation, begins an staunch anti-American purge, ordering all U.S.-born people living within Federation territory to be imprisoned or executed. This quickly draws the attention of the U.S. government.
Twenty United Nations peacekeepers are killed by the Federation and dumped in the ocean for the U.S. to find.
The command station of the U.S.'s newly completed Orbital Defense Initiative, or ODIN, is hijacked by Federation forces, who launch tungsten rods at various cities in the United States. Specialists Kyra Mosley and Baker fight back and successfully scuttle the station before the rest of the payload can be launched, but sacrifice themselves in the process.
El Paso, Houston, Las Vegas, Los Angeles (partially), Miami, New Orleans, Phoenix, San Antonio, San Diego, and San Francisco are destroyed; 27 million are estimated to be killed as a result. The United States becomes crippled and is no longer recognized as a superpower nation, and the Federation becomes the sole global superpower thanks to its abundant oil and energy resources.
The Federation launches an invasion against the United States.
Testing of the Federation's new Aegis-class destroyer prototype, repurposed and reverse engineered from U.S. NavyArleigh Burke-class destroyers, proved to be successful. The bow of the ship is outfitted with an updated sonar pulse system, from which the sonic impact is purportedly strong enough to crush organs and shatter bones. Dozens of tests were performed on human subjects, presumably Federation soldiers, and none were reported to have survived the pulse.
Brothers Logan and David "Hesh" Walker and their German Shepherd, Riley, recon the Liberty Wall perimeter and defend it against a Federation incursion. They return to Fort Santa Monica and are ordered by their father, Elias, to investigate Federation activity in "No Man's Land," beyond the Wall.
Logan, Hesh, and Riley make their way through an area 10 miles north of San Diego. They discover a Federation dig site at an ODIN satellite crash and learn that a man named Gabriel Rorke is somehow involved.
Logan, Hesh, and Riley team up with two Ghosts, Keegan Russ and Thomas Merrick, to rescue their partner Ajax from Rorke.
The Ghosts, with the assistance of an entire squadron of AH-64 Apaches, pinpoint Rorke's location to a series of oil fields in the Gulf of Mexico, where he is then captured and brought onboard a transport plane back to the United States.
The United States commits its last remaining aircraft carrier, the U.S.S. Liberator, in an all-or-nothing assault to disable the Federation's kinetic bombardment weapons platform, or "LOKI," before it can be used to destroy the mainland United States.
With the ground array destroyed, U.S. astronauts hijack the LOKI satellite from the Federation and destroy multiple Federation ground targets.
Brothers Logan and Hesh board a Federation supply train in an attempt to kill Rorke and avenge their father. Upon encountering Rorke in the engine room, Hesh issues an order, "Checkmate," for the U.S. astronauts to fire upon the train. The train then lands into the ocean, where a fight later ensues between Hesh and Rorke as Logan grabs Rorke's handgun and loads a single cartridge. Logan takes aim and fires, apparently killing both Rorke and Hesh, but inadvertently shattering the window behind them. Logan grabs Hesh and swims for the surface, where Hesh then notifies Merrick of Rorke's death. However, Rorke, seemingly unscathed from the shot, emerges from behind the brothers, knocking out Hesh and breaking Logan's arm, stating that he plans to turn him against the Ghosts, and drags Logan away.