Four fish farmers went on trial on Tuesday on charges of attempted murder for resisting an eviction with weapons, Vietnamese media reported.
Doan Van Vuon, his two brothers and nephew are accused of using homemade mines and shotguns during the incident in January 2012, online newspaper VNExpress reported. Seven officers were injured.
Videos of the clash were uploaded onto several blogs and Mr. Vuon soon became a popular hero for standing up to the police.
The defendants could face up to seven years in prison if found guilty. The trial in Hai Phong city ends on Friday.
Land rights are an ongoing source of discontent in Vietnam, where the state gives farmers the right to use land but keeps control of it.