Origin

Soldier is a former member of Hydra, who eventually was able to de-program himself. He quit and blacked out his tattoos, moving into a tenement building with his mom. Zodiac used the tenement building for one of his many tests against Moon Knight, turning Soldier into a pawn. After being rescued by Moon Knight, he pledged his loyalty to him and his Midnight Mission.

Creation

Soldier debuted in Moon Knight (2021) #2 by Jed MacKay and Alessandro Cappuccio.

Major Story Arcs

Midnight Mission

When Zodiac lured Moon Knight away from the Midnight Mission with his two fighter allies, Tigra and Rutherford Winner, Soldier was forced to defend the Midnight Mission. He put on a the Mr. Knight suit and went out into the street to fight Zodiac's gang. Zodiac never gave him a chance. Zodiac shot him dead.

The Structure

When Zodiac shot through Reese and killed Soldier, enough DNA survived on the bullet to infect Soldier with Reese's vampiric curse. This got the attention of Tutor, the vampire who had sired Reese and was running the vampire cult, The Structure. He believed that Soldier was the first of many, so he treated the Midnight Mission as a rival organization.

After Moon Knight did some investigating, they tracked The Structure to a convention center, where they were having a fancy meeting. Moon Knight intended to confront them, but he needed Soldier to use his domestic terrorism training. Soldier sabotaged the fire suppression system, forcing the sprinklers to go off in the main hall, for Moon Knight to consecrate into holy water.

The Last Days of Moon Knight

The Midnight Mission was targeted by a mysterious new Black Spectre, who was working with a number of Moon Knight's old foes. One such villain was Sidney Sarnak, who had perfected a way of brainwashing people with sound. One test incident was when they caused a riot during a concert that Reese and Soldier were in attendance of. After interrogating one of the his goons, Moon Knight learned that Black Spectre planned on using this technology on the entire New York population. Moon Knight tracked the operation to a skyscraper in the city and formed a field team, with Soldier on the ground doing recon on The Mount before the rest of the team made there approach. Unfortunately, Black Spectre was ready for them and took down their airship, causing them to crash into the building.

With the Black Spectre's goons focused on the crash higher up the building, Soldier had the opportunity to break in through the front door. In his new moon-themed military gear, he made his way through the building until he found Tigra. She had stepped on a land mine and was stuck. Thankfully, he had training in disarming such bombs. Once Tigra was freed, they reunited with Badr, but the trio couldn't get to Moon Knight. With no other option, Moon Knight sacrificed himself to take out the weapon.

Per his last request, Reese took over the Mission for Moon Knight, with Soldier staying on as a team member.

Vengeance of Moon Knight

While trying to protect their part of New York, the Midnight Mission is attacked by a masked mystery man claiming to be the new Moon Knight. He had already attacked 8-Ball and was looking to target the rest for being too ineffectual or monstrous to carry on the legacy. He easily fought off the whole team, however, when he entered the Mission, the sentient building rejected him completely. This forced the new Moon Knight to give up on taking back the storefront but warned them to stay out of his way.

Unfortunately, this was only the beginning of the problem. This new Moon Knight went after masked criminals so aggressively, that those masked criminals started targeting the Midnight Mission, putting the community they protect in danger. They were forced to approach Lady Yulan and call in the favor they earned taking out The Structure. She led them to his daylight hiding spot where it was revealed he was The Shroud.

Shroud was deadset on being the new Moon Knight and thought he was honoring Marc's legacy. He believed he had ruined The Shroud identity and needed to rebrand himself, but Tigra managed to convince him that he needed work on himself instead. Unfortunately, just as he was coming around to accepting the Mission's help, he was transformed into a portal for darkforce (as did all the darkforce users on Earth) blocking out the sun.

Blood Hunt

The Structure had used Atlantean magic to block out the sun with darkforce energy. This was their first step to world domination. The second was wave after wave of global uprisings, including New York, but Soldier and the Mission were ready to fight back.

Solider was out on the street when the skies were cleared. He and all the other vampires were no longer weak to sunlight. He and the Mission, now including Moon Knight, resurrected by Khonshu to fight the vampires, had to continue working to clear the streets of vampires.

Midnight Mission Tomb

In Marc's absence, a new drug kingpin, Achilles Fairchild, had moved in on the Midnight Mission territory thanks to his magic drug, Glitter. When Moon Knight started to threaten him, Achilles changed the street name to Moon Dust and framed the Midnight Mission for its manufacturing and distribution. Achilles even sent his enforcer, Carver, with her enchanted Vanaheim sword, to take out the House of Shadows, leaving the team vulnerable to an incoming SWAT raid. The team was forced underground, to a decommissioned SHIELD station once used by Slasher, a villain Moon Knight had stopped previously.

Marc attempted to take down the Glitter operation from the top down, but Achilles revealed he was from Asgard and much too powerful than Marc. Instead, Marc decided they had to start from the bottom up. First step was asking a favor from Hank Pym to make an antagonist agent to help users kick the drug. The Mission used at on Achilles inside people in the police. Marc then freed Carver from her sword's enchantment by pitting the soul of the dragon possessing it against Khonshu and taking the weapon for himself. They then planned a two pronged attack on Achilles' office. Marc, Badr, and Reese would come in from the sky while Tigra, Soldier, and 8-Ball sneak in through the street.

Soldier and the others are able to handle the supervillain goons that Achilles hired to distract them while Marc chases down Achilles. Scared of Carver's sword, Achilles doesn't try to fight. He fled but was teleported away by Zodiac.