Up to 80 Derby County and Nottingham Forest followers were involved in what a court was told was "unadulterated and pre-arranged football hooliganism".
A crowd of 50 Rams fans gathered in the car park of a pub in Trowell where they waiting for 30 Reds fans who travelled to meet them for a mass brawl, Nottingham Crown Court heard today.
When the two rival groups of fans clashed in the street residents were left "frightened and intimidated" with one woman confronting two men who told her "you've got to let us in or we'll get our heads kicked in".
A total of 14 men have already pleaded guilty to conspiracy to commit violent disorder but three others have denied the same charge and are currently on trial at Nottingham Crown Court.
They are Timothy Green, 23, and Samuel Chambers, 18, who both support Derby, and Forest fan Ian Litman, 48.
Sarah Knight, prosecuting, has this morning opened the case against the trio.
She said: "Although the level of violence meted out was not huge and the actual encounter itself was relatively short-lived, it could have been on a far more frightening and significant scale.
"There was a significant degree of planning to arrange the clash and this was done over a period of time before the football match and the encounter took place.
"We say that each of the three in the dock had their part to play."
Miss Knight said the fighting happened hours after Forest beat Derby 1-0 at the City Ground in September 2013.
She told the jury that CCTV seized will show them how a group of Derby County fans congregated in Ilkeston Market Place after the match and they travelled by bus to the Festival Inn, in Trowell.
Once there they did not enter the pub but "huddled together" outside trying to conceal their identities by wearing their hoods up.
Two hours later, taxis carrying Nottingham Forest followers arrived in Nottingham Road and the clash took place.
Miss Knight said: "Small groups of Derby fans started moving out of the car park of the Festival Inn, gathering momentum as more joined them.
"Within a minute of arriving in Nottingham Road, the Forest group were caught on CCTV running back from where they came from being pursued by the Derby contingent.
"Witnesses heard glasses smashing and a number of people called the police."
Miss Knight said a number of residents in Nottingham Road gave statements to the police after the clash had finished.
One of them said the atmosphere was "intimidating and starting to boil over" while another called the police after witnessing one man being "attacked and punched in the face" by a group.
Miss Knight said: "One woman was in her back garden when one of her daughters banged on the window to alert her to two men who had jumped over their fence.
"She said to them 'what are you doing?' and one of them said to her 'you have got to let us in or we are going to get our heads kicked in'.
"They then jumped back over the fence and they were gone."
Miss Knight said another Nottingham Road resident was in his car and was on his way to pick up his daughter from Nottingham when he saw a group of 15 to 20 men in the road.
She said: "He said they were zig-zagging across the road throwing punches at each other.
"He described them as 'acting like animals'."
The trial continues.
All three of the men on trial were arrested in February 2014, almost five months after the fight.
In interview Green told officers he had been at the Festival Inn and was there when the trouble flared.
But he denied being involved, telling them he had gone to the help of a man who was being beaten up, Miss Knight said.
However, she said social media evidence showed he had sent a number of Instant Messenger messages two days before the brawl. She said that in them Green made comments to them about how he had "spoken to the younger lot" who were "coming", references Miss Knight said showed he was part of the planning.
Chambers, who was 16 at the time, had not been at the scene of the fight but Miss Knight said he was part of the conspiracy to arrange it. She said he had been involved in a number of internet group chats in the days before it happened.
Miss Knight told the jury that one message read: "If they wanted it so much they would meet us, they are scared to leave Notts."
Litman, the court was told, was an older member of the Forest group who travelled by taxi to Trowell.
Statements were read out in court which were made by people who either work at or were customers at The Festival Inn on the afternoon of the brawl.
Robert Bown and partner Lisa Davies went to the pub to watch the match and stayed afterwards.
Mr Bown, in his statement, said: "The group of Derby fans walked out of the car park; they started shouting. An older man had five or 10 glasses thrown at him. It was clear they were there for violence."
Derby fans Timothy Green, 23, of Cavendish Street, Derby, and Samuel Chambers, 18, of Maple Avenue, Sandiacre, and Forest fan Ian Litman, 48, of Western Boulevard, Aspley, yesterday entered not guilty pleas to conspiracy to commit violent disorder.
Forest fan Mark McKendrick, 41, of North Road, West Bridgford, Nottingham, pleaded guilty to conspiracy to the charge.