Forty-two years ago today, on Oct. 4, 1974, the first-ever Volunteer Jam was held at the War Memorial Auditorium in Nashville.

The Volunteer Jam, founded by Charlie Daniels, was originally scheduled as a live recording session for two songs, "No Place to Go" and "Orange Blossom Special," from the Charlie Daniels Band's 1974 Fire on the Mountain album. The group invited Dickey Betts from the Allman Brothers Band and Toy Caldwell, Jerry Eubanks and Paul Riddle from the Marshall Tucker Band to join them for the session, not realizing that it would be the start of a tradition that would carry on for more than four decades.

“When we first started back in 1974, there was nothing else like it," Daniels recalls. "It got to be a problem to get a really good roster of talent, so we kind of laid off for a while.

“... The only two things in my life that have been longer than Volunteer Jam is my band, which has been 42 years — and my wife, which has been 51 years," he continues. "So it’s pretty gratifying, very humbling.”

Since that first event, the Volunteer Jam has featured dozens of artists, including one who remains the biggest surprise guest that Daniels has ever had.

“I was standing onstage one night, and I looked, and out of the corner of my eye, I saw my all-time hero Roy Acuff,” Daniels recalls. “Had no idea he was there. And he was standing over there, grinnin’ like an opossum.

“He was such a nice, warm-hearted man. He had come between shows at the Grand Ole Opry … just because that was the kind of guy he was,” Daniels adds. “He got such a big charge out of it. So I brought him out. The crowd went nuts; they just loved him. He came out and did a couple songs.

"I’ve had people show up that I didn’t know was gonna be here," he says. "This is Nashville, after all.”

The Volunteer Jam is a benefit for the U.S. military and veterans through the Journey Home Project. Daniels hosted a 40th anniversary Volunteer Jam celebration on Aug. 12, 2015, with a star-studded list of guests that included Ted Nugent, Trace Adkins, Alabama, Terri Clark, Billy Ray Cyrus, Colt Ford, the Grascals, the Kentucky Headhunters, Tracy Lawrence, the Oak Ridge Boys, Ryan Weaver, Wynonna Judd, Craig Morgan, Lee Roy Parnell, Billy Dean, Michael W. Smith, Travis Tritt, Phil Vassar and Montgomery Gentry, among others.

The 2016 Volunteer Jam is scheduled for Nov. 30; the event will also help celebrate Daniels' 80th birthday, on Oct. 28.

“This year, I combined two milestones: my 80th birthday and the Volunteer Jam,” Daniels says. “It’s pretty amazing that we’re both alive and kicking and still going strong."

See Pictures From the 40th Anniversary Volunteer Jam