Gulliver's position in Lilliput became precarious when he refused to enslave the rival people's, the Blefuscuians.  However, below are the articles of Impeachment against him.

 1. Gulliver had illegally made water within the precincts of the palace. (He peed to put out a fire.  This outraged the Lilliputians)

2. Gulliver refused to deliver the Blefuscuians to servitude.
3. Gulliver was friendly with the Blefuscuians when they came to Lilliput. (The Lilliputians considered this treason)

4. Gulliver was preparing for a visit to Blefuscu to see the Emperor of Blefuscu, enemy of the Lilliputian Emperor with only verbal permission to do so.

Above are the causes for his collapse.  It is significant because the two warring islands can be seen to represent the political situation of Europe at the time - namely between England and France.  In the satire, England is Lilliput and Blefuscu is France.