Three English Defence League supporters appeared at Aylesbury Magistrates Court on Friday over alleged offences on the day the group protested in May.
Among them was Richard Price, 40, the EDL's West Midlands co-ordinator.
Mr Price, of Stonehouse Lane in Quinton, gave no indication to his plea on a charge of violent disorder.
Collum Keyes, 23, of Somerton Drive in Birmingham, pleaded not guilty to violent disorder.
Prosecutor Shahreena Coker said the pair were arrested after EDL members surged through police lines after their Market Square protest on May 1.
Also in court was Daryl Hobson, 43, of Newland Road in Worthing, West Sussex.
Wearing an EDL jersey, he pleaded not guilty to a charge of threatening and abusive behavior.
Mr Price and Mr Keyes were told that their case would be heard at Aylesbury Crown Court, and were released on conditional bail - which prevents them taking part in EDL rallies - for a commital hearing on August 20.
Mr Hobson was released on unconditional bail, with his trial at Aylesbury Magistrates Court set to start on November 8.