"How do we know you won't one day act against America's interests?" - Swanwick to Kal-El
Lieutenant General Swanwick is an officer in the United States Army. He is the head of United States Northern Command, an organization sworn to deter, prevent, and defeat threats and aggression aimed at the United States.
"I'm just speculating, but I think whoever's at the helm of that ship is looking to make a dramatic entrance" — Swanwick to Dr Hamilton
General Swanwick was alerted to the mission control room at Peterson Air Force Base when an unidentified object settled into orbit near Earth. Shortly thereafter, a menacing message was sent all across the Earth from the extraterrestrial General Zod, who demanded that a fellow alien from his planet, a man named Kal-El (who had tried to blend in with Earth's population for decades), be handed into his custody, and that if the latter wasn't turned in to Zod within 24 hours, the entire planet would suffer severe consequences of apocalyptic proportions.
Kal-El himself arrived at a military base shortly afterwards, surrendering if Lois Lane was to be freed. Kal-El and Lois sat in an interrogation room where the General questioned Kal-El on his motives, before handing him over to Zod's second-in-command, Faora Hu-Ul, who requested that Lois come too.
After the Battle of Smallville, Kal-El (now nicknamed "Superman") and Lois came, along with Kal-El's Spaceship, telling the General how to send Zod and his followers back to the Phantom Zone, this time permanently. The plan was to collide the Phantom Drive of Superman's infant starcraft with Black Zero's, in an attempt to create an unstable Phantom energy singularity, which would suck all of Zod's forces back into the Zone. Before they could do so, however, Superman would have to personally destroy Zod's World Engine and end Earth's terraformation. Swanwick agreed to the plan and ordered the attack, after which Superman promptly took flight to the Indian Ocean.
Ultimately, while the plan was successfully executed (with only Zod remaining on Earth), it came at the cost of Colonel Hardy and Dr. Hamilton's lives, with only Lois escaping the singularity's pull, due to Superman's timely intervention. Nonetheless, Earth and all of humanity had been saved from the alien invasion.
Official Alliance with SupermanEdit
Shortly after the end of the Kryptonian invasion, General Swanwick had drones try to track down Superman's whereabouts, determined to find his address. Superman, however, wasn't pleased, and proceeded to slam one of the drones into the ground, right in front of Swanwick's car, much to the latter's dismay. Superman assured the general that, having grown up in Kansas, he was technically an American himself, so he would never act against the United States' interests. However, while Superman would always remain an ally to both America and all of Earth, he requested that it be done on his own terms, and that he trusted Swanwick's ability to convince Washington D.C. of that. With that said, Superman took flight again at supersonic speeds, leaving Captain Farris smiling, in awe of the handsome alien.
- At the San Diego Comic Con International 2013, Harry Lennix was bought up on stage by Zack Snyder to read a quote from The Dark Knight Returns (the famous "I want you to remember the one man who beat you" speech) as a logo appeared on-screen, merging the Superman and Batman symbols, thus announcing the Man of Steel sequel to be the very first Superman/Batman film.