Police moved in to clear 49 illegal plots on the Dale Farm travellers site in south east England expecting violence.
Authorities said they had received intelligence they would face protests following the travellers’ last-ditch attempt to stave off the evictions at the Court of Appeal on Monday.
Bricks and debris were thrown at police as they broke down a rear fence and moved in to prepare the way for bailiffs.
At least 50 officers led the operation in which they said two people had been tasered and one arrested.
Electricity supplies were cut with the travellers claiming this had turned off crucial medical equipment belonging to elderly residents.
The eviction comes at the end of a lengthy legal battle which started six years ago when authorities declared the development illegal.
The leader of the Basildon Council said the travellers had turned down alternative accommodation.