What is the primary focus of the war between Lilliput and Blefuscu?

The primary focus of the war between Lilliput and Blefuscu, according to Jonathan Swift's "Gulliver's Travels," centers on the absurd and trivial conflict over egg-cracking methods. The story illustrates how the two nations have divided themselves based on a seemingly inconsequential issue: whether to crack their eggs at the larger end or the smaller end. This satirical conflict serves to critique the way that serious political and religious disputes can often be derived from equally petty disagreements.

While concepts of territorial expansion, religious differences, and political power are common themes in real-world conflicts, the war between these two fictional nations highlights the ridiculousness of human conflicts that arise from trivial matters. This element of satire reflects Swift's commentary on the nature of political and social disputes during his time. The focus on egg-cracking methods exemplifies how people can become embroiled in disputes that seem absurd when viewed from a more rational perspective.