In "Fahrenheit 451," war serves as a backdrop that underscores the societal and personal conflicts within the narrative. The war is ever-present yet ambiguously defined, reflecting the characters' ignorance and indifference towards global events. This theme of war highlights the dangers of a society focused on entertainment and superficial concerns, ignoring the significant issues that threaten its existence.

The war's presence is felt through bombers flying overhead, illustrating the violent and reckless nature of the dystopian society. Montag, the protagonist, is disturbed by the constant presence of bombers and the lack of public discourse about the war. He questions why no one discusses the bombers and atomic wars, highlighting a societal disconnect. Montag's frustration is evident when he exclaims, "Every hour so many damn things in the sky! How in the hell did those bombers get up there every single second of our lives! Why doesn't someone want to talk about it! We've started and won two atomic wars since 1990! Is it because we're having so much fun at home we've forgotten the world? . . . Do you know why? I don't, that's sure!"

Characters like Mrs. Phelps and Mrs. Bowles embody the societal apathy towards war. Mrs. Phelps, for instance, is unconcerned about her husband's military deployment, naively believing it will be brief and without risk. She says, ". . . the Army called Pete yesterday. He'll be back next week. The Army said so. Quick war. Forty-eight hours, they said, and everyone home. . . I'll let old Pete do all the worrying. Not me. I'm not worried. . . I've never known any dead man killed in a war." This ignorance reflects a society unprepared for the catastrophic consequences of conflict.

The war's rapid conclusion coincides with Montag's break from his old life, symbolizing the end of societal complacency and the beginning of a new awareness. The war, which "began and ended in that instant," results in the destruction of the city, highlighting the fragility of a society that ignores the realities of war. Montag's escape and survival signify the importance of individual thought and knowledge in rebuilding society. The war ultimately serves as a catalyst for change, forcing the characters to confront the consequences of their ignorance and apathy.