Civil War is a 2006–2007 Marvel Comics crossover storyline built around a seven-issue limited series of the same name written by Mark Millar and penciled by Steve McNiven, which ran through various other titles published by Marvel at the time. The storyline builds upon the events that developed in previous Marvel crossovers, particularly Avengers Disassembled, House of M, Decimation, and Silent War. The tagline for the series is, "Whose Side Are You On?"