Antagonist A.D started in 2005 by vocalist Sam Crocker and bassist Joshua Moffitt. The intention was to create a fast heavy metallic hardcore band – in the vein of unrelenting American acts such as Martyr A.D. and Until The End combined with ‘euro’ breaks similar to European bands Arkangel and Maroon.
Known then as simply ‘Antagonist’ – feeling the bands shared similar ideals and ethos the name was taken from Maroons debut full length.
The original line up also comprised drummer Brendon Wishnowsky and Sean Connolly. The band quickly recorded a well received 4 song demo with Ulcerate's Jamie Saint Merat.