Full Name: Marchrius Dennis Rossi
Birthplace: Idaho, USA
Position: Peregrine Falcons, Major, leader of 1st Squad
Marco is a legendary soldier, best known for rallying the crumbling forces of the Regular Army against General Morden in the first war. He would attempt to retire after the second war, but would be denied his leave. He is generally a well-mannered man, but the mere mention of Morden's name is enough to enrage Marco. He's also a bit of a computer nerd.
In Metal Slug 6 and 7, Marco works best with his handgun; the starting weapon does more damage, and he can unleash a torrent of shots in an instant.
He also appears as a playable character in Neo Geo Battle Coliseum, using varied techniques such as a close-quarters combat mode, the infamous Vomit Attack while zombified, and calling in the titular tank to devistate the opponent.