The stands are packed with red-and-black-clad fans who chant incessantly, accompanied by a steady drumbeat and swirling flags.
"Atlanta!" they shout from one end of Bobby Dodd Stadium.
"United!" everyone else responds.
There's plenty to cheer about with an expansion team that has already displayed a dynamic style of play, scoring 11 goals in its first three games.
It's early, but say this: Atlanta has really embraced Major League Soccer.
"It's like a party out there every time you take the field," midfielder Julian Gressel said. "Even coming out for warmups, you get goosebumps on your body. It's just a great feeling."
While impressive on the field, winning the last two games by a combined score of 10-1, United's best work has come in the stands.
The inaugural contest, a 2-1 loss to New York Red Bulls that United led most of the way before surrendering two late goals, attracted a sellout of 55,297 to a stadium best known as the home of Georgia Tech's college football team.
It was larger than any crowd drawn this past season by the Yellow Jackets.
That was followed by turnout of 45,922 for Saturday's 4-0 blowout of Chicago — another sellout, essentially, since the school closed off 10,000 seats in the upper deck for previously planned renovation work.
Not too shabby, considering United won't even move into its permanent home, $1.5 billion Mercedes-Benz Stadium, until late July.
"The support has been just amazing. We're very, very fortunate that we've got this atmosphere to play in front of," defender Michael Parkhurst said. "We don't want to take it for granted. We want to make this a real fortress and a place where teams dread to come to play."
United is one of two new franchises that joined MLS this season, but it hardly has the look of a neophyte organization.
Not with a big-pockets owner such as Arthur Blank, who also owns the NFL Falcons. Not with a well-known coach such as Gerardo "Tata" Martino, whose previous stints include Barcelona and guiding the mighty Argentina national team. Not with a roster that includes Josef Martinez, a 23-year-old Venezuelan on loan from Italian Serie A club Torino, as well as players such as Miguel Almiron, Hector Villalba and Yamil Asad to press the attack.
Martinez already has an MLS-leading five goals, including two of the world-class variety in United's latest victory.
Taking advantage of a Fire team that played most of the game a man down, Almiron threaded a pass between four defenders to send Martinez into the clear for his first goal in the 60th minute. Then, after another brilliant pass from Asad, the speedy forward flicked the ball away from the goalkeeper and managed to slowly curl the ball just inside the far post in the 82nd to finish off the rout.
"Josef Martinez is probably the best forward in this league," Gressel said. "It's not surprising to me that we can go out there and score four or five goals a game."
After an international break, United faces a very tough stretch that will give a better indication of whether this team is a legitimate playoff contender in its very first season. Atlanta plays its next four games on the road before finally returning home April 30.
"It's definitely still an expansion team," Parkhurst said. "We've got our bumps and bruises along the way. Off the field, everyone's still trying to get sorted and situated to the new city."
Indeed, United's debut hasn't been entirely smooth.
In addition to blowing a lead in the opener, some Atlanta fans came under fire for chanting an anti-gay slur. Team officials quickly apologized and vowed to toss anyone who did it again. The crowd was on its best behavior Saturday, even unveiling a banner before the game that said, "Give Racism A Red Card."
After the match was over, a long line snaked up to a merchandise stand on the west side of Bobby Dodd Stadium, everyone standing eagerly with credit cards in hand to gobble up more United gear.
In a city starved for championships, especially after the Falcons squandered a 25-point lead and lost to New England in last month's Super Bowl, this team has provided a quick salve.
"It's really special," said goalkeeper Alec Kann, a native of the Atlanta area. "Things are moving in the right direction, for sure."