In 2008 John Brannon recorded vocals for 2 songs on Vitamin X's album Full Scale Assault, recorded by Steve Albini.
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Over the years Sense Of Purpose have supported a host of touring bands including: Agnostic Front (US), H20 (US), AFI(US), Cro-Mags (US), Terror (US), Ensign (US), No Fun at All (Sweden), Strife (US), Champion (US), Citizen Fish (UK), Agent Orange (US), Balance (NZ), Shank (Scotland), DSM (NZ), Shutdown (US), Good Clean Fun (US), Strike Anywhere (US), Dayglo Abortions (Can) and Vitamin X (Neth).