<P> From the late 1960s, parading and marching became a much more fraught issue . The Public Order Act was used against numerous marches, and the issue of parading and of who was allowed to march in what area became even more heated . In 1969 an Apprentice Boys parade in Derry led to what is now known as the Battle of the Bogside, considered by many to mark the start of the Troubles . Several months - long bans on parading were made in the early 1970s, although none of these covered the main Protestant parading period . The Special Powers and Public Order Acts were modified on several occasions in the 1970s and 1980s . </P> <P> Several areas have been the focus of a disproportionate amount of conflict over parading . These include Derry, Ormeau Road in Belfast, and especially the Drumcree area of Portadown . The Drumcree conflict flared up in the 1970s, the mid 1980s and the mid to late 1990s . Disputes over whether the Orange Order should be allowed to parade through mainly nationalist areas were often accompanied by severe violence . In 1983 - 4 a group of republican activists in the town researched the history of sectarian violence in the area as part of a campaign to have the Drumcree and other Orange marches banned from nationalist parts of Portadown . Their findings were distributed to visiting journalists in 1997 and presented in abridged form to the Parades Commission that was set up by the British Government in 1998 in an attempt to deal with contentious parades . An amended version of their findings can be accessed online at http://orangecitadel.blogspot.com/ . The Parades Commission has the power to ban, restrict, re-route or impose conditions on any parade in Northern Ireland . The Orange Order has refused to acknowledge the Commission's authority, although the lodges involved in the Drumcree dispute have recently agreed on principle to negotiate . </P> <Table> <Tr> <Th> Date </Th> <Th> Groups involved </Th> <Th> Event </Th> </Tr> <Tr> <Td> 17 March </Td> <Td> Various </Td> <Td> Saint Patrick's Day </Td> </Tr> <Tr> <Td> Easter Sunday </Td> <Td> Republicans </Td> <Td> Commemorates the Easter Rising (1916) </Td> </Tr> <Tr> <Td> 5 May </Td> <Td> Republicans </Td> <Td> Commemorates the republican hunger strike (1981) </Td> </Tr> <Tr> <Td> 1 July </Td> <Td> Various groups, mostly unionist </Td> <Td> Commemorates the Battle of the Somme (1916) </Td> </Tr> <Tr> <Td> 1st Sunday in July </Td> <Td> Orange Order </Td> <Td> "Drumcree Sunday" </Td> </Tr> <Tr> <Td> 12 July </Td> <Td> Orange Order </Td> <Td> The Twelfth </Td> </Tr> <Tr> <Td> 9 August </Td> <Td> Republicans </Td> <Td> Commemorates the introduction of internment (1971) </Td> </Tr> <Tr> <Td> Saturday nearest 12 August </Td> <Td> Apprentice Boys of Derry </Td> <Td> Commemorates the Siege of Derry (1689) </Td> </Tr> <Tr> <Td> − 15 August </Td> <Td> Ancient Order of Hibernians </Td> <Td> Lady Day </Td> </Tr> <Tr> <Td> last Saturday in August </Td> <Td> Royal Black Institution </Td> <Td> "Black Saturday" </Td> </Tr> <Tr> <Td> last Sunday in October </Td> <Td> Orange Order </Td> <Td> Reformation Day </Td> </Tr> <Tr> <Td> 2nd Sunday in November </Td> <Td> British Legion and others </Td> <Td> Remembrance Sunday </Td> </Tr> <Tr> <Td> Saturday nearest 18 December </Td> <Td> Apprentice Boys of Derry </Td> <Td> Commemorates the Siege of Derry (1688) </Td> </Tr> </Table> <Tr> <Th> Date </Th> <Th> Groups involved </Th> <Th> Event </Th> </Tr>

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