the Apprentice Boys' Parade

Từ điển Oxford Advanced Learner 8th

the Apprentice Boys’ Parade [the Apprentice Boys Parade] BrE NAmE
an occasion on 12 August every year when some of the Protestant citizens of Northern Ireland march through the streets of ↑Derry, in memory of the day in 1689 when the army of the Roman Catholic King ↑James II was forced to give up attacking the town. The march creates a lot of tension between Protestants and Catholics, and this sometimes leads to violence. See also Orangemen.