The Offspring will be joined by many on its Conspiracy Of One tour, which includes several spring festival dates in the U.S. in April and May and heads off to France in June. The Southern California-based punk outfit will begin the tour with an April 20 date in Austin, Texas, playing on a bill with Spacehog, Orgy, and Oleander. On most of the tour's non-festival dates, Fenix TX and Sum 41 will support.

"Conspiracy of One" debuted at No. 9 on The Billboard 200 last December and has sold 924,000 copies in the U.S. to date, according to SoundScan. More dates are expected to be announced, and will be posted on the group's official Web site as they are confirmed.

Here are the Offspring's tour dates:
April 20: Austin, Texas (Waterloo Park, with Orgy, Oleander and Spacehog)
April 21: McAllen, Texas (Villa Real Convention Center)
April 22: Houston, Texas (C.W. Mitchell Pavilion, with Spacehog, Orgy, Eve 6, and Linkin Park)
April 24: New Orleans (House Of Blues)
April 25: Pensacola, Fla. (Bayfront Auditorium, with Fenix TX and Sum 41)
April 27: Miami (Bayfront Park, with 3 Doors Down, Staind, Linkin Park, and Disturbed)
April 28: Tampa (Festival Park, with 3 Doors Down, Staind, Linkin Park, and Disturbed)
April 29: Orlando, Fla. (WJRR Festival, with Disturbed and others)
May 3: Myrtle Beach, S.C. (House Of Blues, with Fenix TX and Sum 41)
May 4: Atlanta (Music Midtown Festival)
May 5: Memphis (Beale St. Music Festival)
May 7: St. Louis (Pageant)
May 8: Springfield, Mo. (Shrine Mosque)
May 9: Kansas City, Mo. (Uptown Theater, with Fenix TX and Sum 41)
May 11: Morrison, Colo. (Red Rocks)
May 12: Albuquerque, N.M..