Agression is an American hardcore punk band from Silver Strand Beach, Oxnard, California, United States.
Before becoming a punk band, in 1979 singer Mark Hickey, guitarist Henry Knowles, and bassist Bob Clark skated for Sims.
Minnick was well known in the So-Cal punk scene as the former drummer of two seminal Nardcore bands, Ill Repute and Habeas Corpus.
The distinctive "bar-s" logo the band used since 1981, designed by artist Jamie Hernandez (illustrator of the comic Love and Rockets) resembling a black bar with a single lightning-bolt style S, or more accurately, the Sig, or Sowilo Germanic rune meaning "sun", or "victory" offset to the left of the bar, was misunderstood by many of the younger members of the punk scene.
[citation needed] In early 2000, the band reformed in San Jose, California, with Knowles, Rob Thacker, Ryan Fassler and Drew Klein.
This line-up continued through many shows with bands like Dead Kennedys, DI, Jim Jones Brigade, and Pitch Black.
The new millennium brought about the deaths of two of its founding members; Hickey in 2000, due to acute liver failure, and Knowles to leukemia in 2002.
In mid-2002, a "Henry Knowles Memorial Show" took place at Skatelab, in Simi Valley, California, featuring the "Nardcore All-Stars" (who did an all-Agression song set list), Rejected Society, The Missing 23rd, Dr. Know and Ill Repute, among others.
From June 14–17, 2007, the same lineup minus JellyRoll performed in Northern California in a four-day tour to celebrate the release of the Agression tribute compilation.
More recently, Aggression played at Punk Rock Picnic 2011 on Saturday, April 9, 2011, with the latest line-up: Mark Aber/Rooney, Clark, Thacker, Jess Leedy and Danny Dorman from Circle One.