Several thousand members of the Royal Black Preceptory and their families gathered in the picturesque village of Scarva, Co Down for the annual sham fight yesterday.
From early morning, the spectators began gathering in the village, anxious to obtain a vantage point from which to watch the procession.
The highlight of yesterday's event was the annual sham fight between King William III and the Jacobite James II.
Shortly after 1 p.m., the rival Williamite and Jacobite armies entered the main field and engaged in battle. The outcome was inevitable, with William triumphing once again.
Following the sham fight, members of the Royal Black Preceptory reassembled in front of the magnificent Scarva House, before making the return march back through the streets of the village.
However, many members of the institution were angered at news that fellow members had been attacked as they travelled from Lurgan to the seaside town of Bangor. A small group of nationalist youths threw stones and bottles at a train carrying Royal Black Preceptory members and their families.
Earlier, a parade in Lurgan had passed off peacefully. The marchers had wanted to parade to Lurgan's railway station but were prevented from doing so by the Parades Commission's ruling.
The PSNI said that as the train passed the nationalist Kilwilkee estate, a number of youths threw seven petrol bombs, paint and stones.
There were no reports of injuries but windows in one carriage were damaged.
A senior member of the Royal Black Preceptory, Cllr Jonathan Bell, said the attack was despicable.
"To try to incinerate children playing in a band who were doing nothing but expressing their heritage and culture is objectionable in any understanding of human rights", he said.
The Lurgan marchers returned to the Co Armagh town last night by bus. The PSNI commander in Lurgan, Supt Alan McCrum, said a major security operation had been mounted to get marchers through Lurgan and onto the trains.
Supt McCrum said the attack happened "despite the extent of the policing operation and the best efforts of everyone, including responsible people within the nationalist community. There are no policing solutions to such issues."
The Royal Black Preceptory demonstration at Scarva is traditionally a family day out and yesterday was no exception, with many attractions available for young and old alike.
The village of Scarva was quickly transformed into a colourful scene. Various types of band uniforms, banners and flags added to the carnival atmosphere.
Traditionally, July 13th is a non-political day in the calendar of the loyal orders.