In gulliver's travels, gulliver becomes friendly with the lilliputians and learns that they are at war. with which nation are the lilliputians in conflict?

The correct answer is Blefuscu.

In “Gulliver’s Travels”, Gulliver becomes friendly with the Lilliputians and learns they are at war with the Blefuscu nation.

When Gulliver is in Lilliput he learns that Lilliputians are at war with the Blefuscu nation. The war started because of a silly argument among them. Lilliput people thought an egg should be broken from the small end, meanwhile, the Belfuscu considered it should be open from the big end.  

Jonathan Swift wrote the novel “Gulliver´s Travels” in 1726. He tried to express in a satiric way the world conflicts of the time.