Civil War: Front Line is an 11-issue, limited series tie-in to Marvel Comics's Civil War event which started in August 2006.

"Civil War" is a 2006–07 Marvel Comics crossover event. The storyline consists of an eponymous seven-issue limited series, written by Mark Millar and penciled by Steve McNiven, and various tie-in books. The storyline builds upon previous Marvel storylines, particularly "Avengers Disassembled", "House of M", and "Decimation". The series' tagline is "Whose Side Are You On?"