The Sham Fight happens every year on July 13 at Scarva in Co Down .
It's a hugely popular event, commemorating the victory of William of Orange over King James in 1690.
King Billy camped at the village along with his 30,000-strong army on his way to the Battle of the Boyne.
Every year thousands gather at the tiny village to mark the date.
The main attraction, as well as more parades, is the Sham Fight itself.
In the mock fight, two groups of men march or ride between the crowds and exchange blank gunfire shots.
One group dresses in white and red, and represents the soldier of King Billy while the other wears white and green, representing King James's army.
Families with small kids are warned the gunfire can be loud.
As well as the parade and the Fight, there are stalls with food and drinks, and charity collections.
Check out the old chestnut tree while you're there, where William of Orange is said to have camped.
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