Short answers, pulled from the story.
Atlanta United FC was founded in 2014 and began play as the 22nd team in Major League Soccer in 2017. Arthur Blank announced the expansion franchise award on the 16th of April 2014, with the first regular season match played on the 5th of March 2017 at Bobby Dodd Stadium.
Gerardo Martino, known as Tata Martino, was appointed Atlanta United's first head coach on the 27th of September 2016. He guided the club to a playoff berth in their inaugural 2017 season and led them to the MLS Cup championship in 2018 before leaving to manage the Mexico national team.
Atlanta United drew 73,019 fans to MLS Cup 2018 at Mercedes-Benz Stadium, the largest non-doubleheader crowd in league history. The club also became the first MLS team to average more than 50,000 fans across a regular season, recording an average attendance of 53,002 in 2018.
Atlanta United plays home games at Mercedes-Benz Stadium in Atlanta, which they share with the NFL's Atlanta Falcons. For most matches, the club curtains off the upper level, reducing capacity to approximately 42,500; the stadium's full capacity with standing room is at least 73,019.
Atlanta United has won one MLS Cup (2018), one U.S. Open Cup (2019), one Eastern Conference championship (2018), and one Campeones Cup (2019). The 2019 Campeones Cup victory over Club América 3-2 made Atlanta the first club from the United States to defeat a Mexican side in that competition.
Atlanta United FC is owned by Arthur Blank, co-founder of Home Depot and owner of the NFL's Atlanta Falcons. The club operates as part of AMB Sports and Entertainment, a subsidiary of the Blank Family of Businesses.