How do you know there is a war going on in lord of the flies?

Answer 1

In the first chapter, when Ralph says that the airport back at home will tell rescue where they are stranded, Piggy says, "Not them. Didn't you hear what the pilot said? About the atom bomb? They're all dead." Atomic bombs are launched at targets only during times of war, so it is safe to assume that a war is going on during the book.

Answer 2

In "Lord of the Flies," the boys find themselves on an uninhabited island during a wartime evacuation. This is evident when they discover the remains of a dead pilot in a parachuted jumpsuit and observe distant explosions, indicating an ongoing war elsewhere. The boys' presence on the island is a consequence of the larger conflict happening in the world outside.