A sea of baseball-capped Bostonians flooded to the Hatch Shell Wednesday night to catch glimpses of Red Sox players and hear the Boston Landmarks Orchestra.

The Boston Landmarks Orchestra and the Boston Red Sox teamed up to host the ninth of 10 free concerts that celebrate America, baseball and the 100th anniversary of legendary composer Leroy Anderson’s birth.

As the sounds of tuning instruments into the Star Spangled Banner, the audience collectively stood and removed their Red Sox caps. After the national anthem, conductor Charles Ansbacher approached the microphone to the audience’s cheers.

“We have an American program tonight,” he said.

To celebrate American music, American sports and a famous American composer, the concert showcased Anderson’s classics such as “Blue Tango” and the “Syncopated Clock.”

Concertgoer Nancy Hercules was among the crowd enjoying the music.

“Music soothes the savage beast,” she said.

Although there was a great amount of national pride, the international component of the event was clear. Boston Landmarks Orchestra volunteer Eileen Cimino noted the large number of foreign concertgoers.

“I just handed a flyer to a woman who told me she hasn’t been in America two days yet,” Cimino said.

Ansbacher himself symbolized the concert’s international influences. He has used his music to show his dedication ending to global conflicts. He conducted the world premiere of “Mandela Portrait” in Johannesburg, South Africa in 2004 and in 2005, he conducted the Jerusalem Symphony, featuring Palestinian pianist Saleem Abboud-Ashkar.

“I think the one thing about music and the arts is that it’s universal,” Boston Cares volunteer Maria Maddaloni said. “It’s a common thread that strings people together.”