Sparta is an American rock band from El Paso, Texas, formed in 2001.
 Founding members Jim Ward (vocalist/guitarist) and Tony Hajjar (drummer) are also members of post-hardcore group At the Drive-In.
 Keeley Davis (guitarist) is the former frontman of Engine Down.
The Fall of Troy is an American post-hardcore band from Mukilteo, Washington.
 The band is a trio consisting of Thomas Erak (guitars, vocals, keyboards), Andrew Forsman (drums, percussion) and Tim Ward (bass, screamed vocals) who was later replaced by Frank Ene following his departure from the band in late 2007.
 Ene would remain in the band until their initial break-up in 2010, but Ward rejoined the band in Ene's place for their reunion in 2013.
 Drew Pelisek, formerly of CHON, has been touring with the band on bass and backing vocals since 2017 and both he and Ward are considered to be official members
At the Drive-In is an American punk rock band from El Paso, Texas, formed in 1994.
 The band currently consists of Cedric Bixler (vocals), Omar Rodríguez (guitar, vocals), Paul Hinojos (bass), Tony Hajjar (drums) and Keeley Davis (guitar, vocals).
 After several early line-up changes, the band solidified into a five-piece, consisting of Bixler, Rodríguez, Jim Ward, Hinojos and Hajjar.
 At the Drive-In released three studio albums and five EPs before breaking up in 2001.
 Their third and final album before their split, 2000's "Relationship of Command", received a number of accolades and is cited as a landmark of the post-hardcore genre.
 Following the breakup, Bixler-Zavala and Rodríguez-López formed The Mars Volta while Ward, Hinojos, and Hajjar formed Sparta.
 At the Drive-In reunited in January 2012 and played the 2012 Coachella Valley Music and Arts Festival, as well as the 2012 Lollapalooza Festival.
 In 2016, the band reunited for a second time, with guitarist and occasional lead vocalist Jim Ward no longer participating.
 He was replaced by Sparta's Keeley Davis.
 The band released their fourth studio album, "in•ter a•li•a", in 2017.
James David Ward (born September 19, 1976) is an American musician.
 A self-taught guitarist and pianist, he is the lead singer and rhythm guitarist for the band Sparta; he is also a co-founder of the post-hardcore band At the Drive-In, which he formed in 1993 when he was 17 years old.
El Gran Orgo is the third EP by American post-hardcore band At the Drive-In.
 It was recorded and released in 1997 without the presence of Jim Ward, whose guitar duties were filled by Ben Rodriguez and Omar Rodriguez, the latter of whom had previously played bass on "Acrobatic Tenement".
Jon Bunch (October 25, 1970 – January 31, 2016) was an American rock singer and songwriter, known for fronting the post-hardcore band Sense Field and rock band Further Seems Forever.
 He went to on to form the post-hardcore band War Generation, and, at the time of his death, he was the lead vocalist known as "Johnny Scars" for the band Lucky Scars.
in•ter a•li•a is the fourth studio album by post-hardcore band At the Drive-In, released on May 5, 2017.
 It is their first studio album in 17 years since "Relationship of Command", and their first release since the 2005 compilation album "This Station Is Non-Operational".
 It is also the first studio release by the band since "El Gran Orgo" to not feature founding member Jim Ward, who chose not to participate in the band's second reunion; as well as the first studio album by the band to feature former Sparta guitarist Keeley Davis.
The Gauntlet, also known as Gauntlet Enterprises, was a business founded in November 1975 by Jim Ward that pioneered the field of body piercing in North America.
 It was inspired by Ward's friend and mentor, Doug Malloy.
 The Gauntlet's original location was in Ward's West Hollywood home, but on the evening of Friday, November 17, 1978 it celebrated the grand opening of its first commercial location at 8720 Santa Monica Blvd. (also in West Hollywood).
 Eventually, Gauntlet opened stores in San Francisco, New York City, and Seattle, as well as a franchise in Paris.
The Silverstein & Senses Fail Tour 2015 is a concert tour co-headlined by Canadian post-hardcore band Silverstein and American post-hardcore band Senses Fail.
 The tour supports Silverstein's eighth studio album, "I Am Alive in Everything I Touch" and Senses Fail's Sixth studio album, "Pull the Thorns From Your Heart".
Quiet is a solo EP released by Jim Ward.
 It is the first time Ward has released an album of solo material, although he has previously released two solo songs on compilation discs.
 It was released November 6, 2007 by Ward's own Civil Defense League record label.
 The album was marketed and distributed by Doghouse Records.

Question: Jim Ward is the co-founder of what post-hardcore band?
Answer: At the Drive-In