The first outing was the final home game of the 2012 season, September 27. Meenan had the idea to try to host a group outing. He began by purchasing 100 tickets in the Big Apple Reserve section, and then when they sold out, he purchased 100 more, and then 100 more. In the end, he sold 550 tickets to the game.^[3][4] The 7 Line Army filled the 860 seats of the Big Apple Reserve. From there, Meenan began to plan full schedules each year including home and away games. Tickets were sold on The 7 Line website. For each outing 2012 through 2015, ticket prices included a customized T-shirt.^{[citation needed]}

The 7 Line Army activities for 2014 included 7 games at Citi Field and outings to see AT&T Park in San Francisco, Marlins Park in Miami, Citizen's Bank Park in Philadelphia and Yankee Stadium in New York.^{[citation needed]}

Its participation in 2015 included 9 games at Citi Field and outings at Yankee Stadium in New York, PNC Park in Pittsburgh, Turner Field in Atlanta, Camden Yards in Baltimore and Coors Field in Denver. When the Mets won the division, The 7 Line Army was present at every home post-season game, including the 2015 World Series against the Royals.^[5]

The 7 Line Army 2016 participation included 14 games at Citi Field and outings at Petco Park in San Diego, Miller Park in Milwaukee, two outings to Nationals Park in Washington, DC, and the fourth annual "Bronx Invasion". In 2016, the Army attended both Subway Series games at Yankee Stadium, instead of just one.^{[citation needed]}

Its participation in 2017 included 14 games at Citi Field and outings at Nationals Park in Washington, DC, Busch Stadium in St. Louis, and Safeco Field in Seattle. They were scheduled to go to Minute Maid Park in Houston, but most did not attend due to Hurricane Harvey.^{[citation needed]}

On July 3, 2019, Mets general manager Brodie Van Wagenen sat with The 7 Line Army through 4+1⁄2 innings of a game against the New York Yankees. Though the Mets were playing under .500 and fans had expressed their dissatisfaction with the results of off-season trades, Van Wagenen, wearing the group's orange jersey, was welcomed by the fans and signed many autographs.^[6]

Mets players have noted the effect The 7 Line Army has when playing on the road. “It almost felt like we were playing at home, the support the fans are giving us at other ballparks, it feels real good," said pitcher Jacob deGrom.^[7]

• Bleacher Creatures

• Bondy, Filip (October 28, 2015). "Move Over, Bleacher Creatures: It's the 7 Line Army's Turn". The New York Times. Retrieved March 5, 2017.
• "7 Line Army to be out in force at Citi Field". Newsday. October 25, 2015. Retrieved March 5, 2017.
• "The 7 Line Army marches to Citi Field". Sports Illustrated. October 13, 2015. Retrieved March 5, 2017. (6:10 length video)
• "The Center Field Soldiers of the 7 Line Army" Narratively. August 31, 2022. Retrieved October 26, 2022

• Official website