Battle of the Boyne The Battle of the Boyne ( , ) was fought in 1690 between two rival claimants of the English , Scottish , and Irish thronesthe Catholic King James and the Protestant King William ( who had deposed James in 1688 ) across the River Boyne near Drogheda on the east coast of Ireland . The battle , won by William , was a turning point in James ' s unsuccessful attempt to regain the crown and ultimately helped ensure the continuation of Protestant ascendancy in Ireland . The battle took place on 1 July 1690 in the " old style " ( Julian ) calendar . This was equivalent to 11 July in the " new style " ( Gregorian ) calendar , although today its commemoration is held on 12 July . William ' s forces defeated James ' s army of mostly raw recruits . The symbolic importance of this battle has made it one of the best - known battles in the history of the British Isles and a key part of the folklore of the Orange Order . Its commemoration today is principally by the Protestant Orange Institution . Background to the battle . The battle is seen as the decisive encounter in a war that was primarily about James ' s attempt to regain the thrones of England and Scotland , resulting from the " Immortal Seven ' s " invitation to William and James ' s daughter , Mary , to take the throne . It is especially remembered as a crucial moment in the struggle between Irish Protestant and Catholic interests . In an Irish context , however , the war was a sectarian and ethnic conflict , in many ways a re - run of the Irish Confederate Wars of 50 years earlier . For the Jacobites , the war was fought for Irish sovereignty , religious toleration for Catholicism , and land ownership . The Catholic upper classes had lost almost all their lands after Cromwell ' s conquest , as well as the right to hold public office , practice their religion , and sit in the Irish Parliament . They saw the Catholic King James as a means of redressing these grievances and securing the autonomy of Ireland from England . To these ends , under Richard Talbot , 1st Earl of Tyrconnel , they had raised an army to restore James after the Glorious Revolution . By 1690 , they controlled all of Ireland except for the province of Ulster . Most of James II ' s troops at the Boyne were Irish Catholics . Conversely , for the Williamites , the war was about maintaining Protestant and English rule in Ireland . They feared for their lives and their property if James and his Catholic supporters were to rule Ireland . In particular , they dreaded a repeat of the Irish Rebellion of 1641 , which had been marked by widespread killings . For these reasons , Protestants fought en masse for William of Orange . Many Williamite troops at the Boyne , including their very effective irregular cavalry , were Protestants from Ulster , who called themselves " Inniskillingers " and were referred to by contemporaries as " Scots - Irish " . Ironically , historian Derek Brown notes that if the battle is seen as part of the War of the Grand Alliance , Pope Alexander VIII was an ally of William and an enemy to James ; the Papal States were part of the Grand Alliance with a shared hostility to Louis XIV of France , who at the time was attempting to establish dominance in Europe and to whom James was an ally . Opposing forces . Commanders . The opposing armies in the battle were led by the Roman Catholic King James II of England , Scotland , and Ireland and opposing him , his nephew and son - in - law , the Protestant King William III ( " William of Orange " ) who had deposed James the previous year . James ' s supporters controlled much of Ireland and the Irish Parliament . James also enjoyed the support of his cousin , Louis XIV , who did not want to see a hostile monarch on the throne of England . Louis sent 6 , 000 French troops to Ireland to support the Irish Jacobites . William was already Stadtholder of the Netherlands and was able to call on Dutch and allied troops from Europe as well as England and Scotland . James was a seasoned officer who had proven his bravery when fighting for his brother — King Charles II — in Europe , notably at the Battle of the Dunes ( 1658 ) . However , recent historians have noted that he was prone to panicking under pressure and making rash decisions , possibly due to the onset of the dementia which would overtake him completely in later years . William , although a seasoned commander , was hardly one of history ' s great generals and had yet to win a major battle . Many of his battles ended in stalemates , prompting at least one modern historian to argue that William lacked an ability to manage armies in the thick of conflict . William ' s success against the French had been reliant upon tactical manoeuvres and good diplomacy rather than force . His diplomacy had assembled the League of Augsburg , a multi - national coalition formed to resist French aggression in Europe . From William ' s point of view , his takeover of power in England and the ensuing campaign in Ireland was just another front in the war against King Louis XIV . James II ' s subordinate commanders were Richard Talbot , 1st Earl of Tyrconnell , who was Lord Deputy of Ireland and James ' s most powerful supporter in Ireland ; and the French general Lauzun . William ' s second - in - command was the Duke of Schomberg , a 75 - year - old professional soldier . Born in Heidelberg , Germany , Schomberg had formerly been a Marshal of France , but , being a Huguenot , was compelled to leave France in 1685 because of the revocation of the Edict of Nantes . Armies . The Williamite army at the Boyne was about 36 , 000 strong , composed of troops from many countries . Around 20 , 000 troops had been in Ireland since 1689 , commanded by Schomberg . William himself arrived with another 16 , 000 in June 1690 . William ' s troops were generally far better trained and equipped than James ' s . The best Williamite infantry were from Denmark and the Netherlands , professional soldiers equipped with the latest flintlock musket s . There was also a large contingent of French Huguenot troops fighting with the Williamites . William did not have a high opinion of his English and Scottish troops , with the exception of the Ulster Protestant irregulars who had held Ulster in the previous year . The English and Scottish troops were felt to be politically unreliable , since James had been their legitimate monarch up to a year before . Moreover , they had only been raised recently and had seen little battle action . The Jacobites were 23 , 500 strong . James had several regiments of French troops , but most of his manpower was provided by Irish Catholics . The Jacobites ' Irish cavalry , who were recruited from among the dispossessed Irish gentry , proved themselves to be high calibre troops during the course of the battle . However , the Irish infantry , predominantly peasants who had been pressed into service , were not trained soldiers . They had been hastily trained , poorly equipped , and only a minority of them had functional muskets . In fact , some of them carried only farm implements such as scythe s at the Boyne . On top of that , the Jacobite infantry who actually had firearms were all equipped with the obsolete matchlock musket . The battle . William had landed in Carrickfergus in Ulster on 14 June 1690 and marched south to take Dublin . James chose to place his line of defence on the River Boyne , around from Dublin . The Williamites reached the Boyne on 29 June . The day before the battle , William himself had a narrow escape when he was wounded in the shoulder by Jacobite artillery while surveying the fords over which his troops would cross the Boyne . The battle itself was fought on 1 July OS ( 11th NS ) , for control of a ford on the Boyne near Drogheda , about NW of the hamlet of Oldbridge ( and about WNW of the modern Boyne River Bridge ) . William sent about a quarter of his men to cross the river at Roughgrange , about west of Donore and about SW of Oldbridge . The Duke of Schomberg ' s son , Meinhardt , led this crossing , which Irish dragoons in picquet under Neil O ' Neill unsuccessfully opposed . James , an inexperienced general , thought that he might be outflanked and sent half his troops , along with most of his artillery , to counter this move . What neither side had realized was that there was a deep , swampy ravine at Roughgrange . Because of this ravine , the opposing forces there could not engage each other , but literally sat out the battle . The Williamite forces went on a long detour march which , later in the day , almost saw them cut off the Jacobite retreat at the village of Naul . At the main ford near Oldbridge , William ' s infantry led by the elite Dutch Blue Guards forced their way across the river , using their superior firepower to slowly drive back the enemy foot - soldiers , but were pinned down when the Jacobite cavalry counter - attacked . Having secured the village of Oldbridge , some Williamite infantry tried to hold off successive cavalry attacks with disciplined volley fire , but were scattered and driven into the river , with the exception of the Blue Guards . William ' s second - in - command , the Duke of Schomberg , and George Walker were killed in this phase of the battle . The Williamites were not able to resume their advance until their own horsemen managed to cross the river and , after being badly mauled , managed to hold off the Jacobite cavalry until they retired and regrouped at Donore , where they once again put up stiff resistance before retiring . The Jacobites retired in good order . William had a chance to trap them as they retreated across the River Nanny at Duleek , but his troops were held up by a successful rear - guard action . The Dutch secretary of King William , Constantijn Huygens jr . , has given a good description ( in Dutch ) of the battle and its aftermath , including subsequent cruelties committed by the victorious soldiers . The casualty figures of the battle were quite low for a battle of such a scale — of the 50 , 000 or so participants , about 2 , 000 died . Although three - quarters of them were Jacobites , William ' s army had far more wounded . At the time most of the casualties of battles tended to be inflicted in the pursuit of an already - beaten enemy ; this did not happen at the Boyne , as the counter - attacks of the skilled Jacobite cavalry screened the retreat of the rest of their army . The Jacobites were badly demoralised by the order to retreat , which lost them the battle . Many of the Irish infantrymen deserted . The Williamites triumphantly marched into Dublin two days after the battle . The Jacobite army abandoned the city and marched to Limerick , behind the River Shannon , where they were unsuccessfully besieged . After his defeat James did not stay in Dublin , but rode with a small escort to Duncannon and returned to exile in France , even though his army left the field relatively unscathed . James ' s loss of nerve and speedy exit from the battlefield enraged his Irish supporters , who fought on until the Treaty of Limerick in 1691 ; he was derisively nicknamed " Seamus a ' chaca " ( " James the shit " ) in Irish . Aftermath . The battle was overshadowed in its time in England by the defeat of an Anglo - Dutch fleet by the French two days later at the Battle of Beachy Head , a far more serious event in the short term ; only on the continent was the Boyne treated as an important victory . Its importance lay in the fact that it was the first proper victory for the League of Augsburg , the first - ever alliance between the Vatican and Protestant countries . Thus the victory motivated more nations to join the alliance and in effect ended the fear of a French conquest of Europe . The Boyne also had strategic significance for both England and Ireland . It marked the end of James ' s hope of regaining his throne by military means and probably assured the triumph of the Glorious Revolution . In Scotland , news of this defeat temporarily silenced the Highlanders supporting the Jacobite Rising , which Bonnie Dundee had led . In Ireland , the Boyne fully assured the Jacobites that they could successfully resist William . But it was a general victory for William , and is still celebrated by the Protestant Orange Order on the Twelfth of July . The treaty of Limerick was written first and was very generous to Catholics . It allowed most land owners to keep their land so long as they swore allegiance to William of Orange . It also said that James could take a certain number of his soldiers and go back to France . However , Protestants in England were annoyed with this kind treatment towards the Catholics , especially when they were gaining strength and money . Because of this , the penal laws were introduced . These laws included banning Catholics from owning weapons , reducing their land , and prohibiting them from working in the legal profession . Commemoration of the battle . Originally , Irish Protestants commemorated the Battle of Aughrim on 12 July ( old style , equivalent to 23 July new style ) , symbolising their victory in the Williamite war in Ireland . At Aughrim , which took place a year after the Boyne , the Jacobite army was destroyed , deciding the war in the Williamites ' favour . The Boyne , which in the old Julian calendar , took place on 1 July , was treated as less important , third after Aughrim and the anniversary of the Irish Rebellion of 1641 on 23 October . What was celebrated on " The Twelfth " was not William ' s " victory over Popery at the Battle of the Boyne " , but the extermination of the elite of the Catholic Irish at Aughrim , thereby ending the fear of having to surrender the planted lands . In 1752 , the Gregorian calendar was adopted in Ireland , which erroneously placed the Boyne on 12 July instead of Aughrim ( the correct equivalent date was 11 July , as the difference between the calendars for the year in question , 1690 , was not 11 days but only 10 days ) . However , even after this date , " The Twelfth " still commemorated Aughrim . But after the Orange Order was founded in 1795 amid sectarian violence in Armagh , the focus of parades on 12 July switched to the Battle of the Boyne . Usually the dates before the introduction of the calendar on 14 September 1752 are mapped in English language histories directly onto the Julian dates without shifting them by 10 or 11 days . Being suspicious of anything with Papist connotations , however , rather than shift the anniversary of the Boyne to the new 1 July or celebrate the new anniversary of Aughrim , the Orangemen continued to march on 12 July which was ( erroneously ) thought to have marked the battle of the Boyne in New Style dates . Despite this , there are also smaller parades and demonstrations on 1 July , the date which maps the old style date of the Boyne to the new style in the usual manner and which also commemorate the heavy losses of the 36th ( Ulster ) Division on the first day of the Battle of the Somme in July 1916 . The memory of the battle also has resonance among Irish nationalists . Most Irish people see the battle as a major step on the road to the complete British colonisation of Ireland . In 1923 , IRA members blew up a large monument to the battle on the battlefield site on the Boyne and destroyed a statue of William III in 1929 that stood outside Trinity College , Dublin in the centre of the Irish capital . " The Twelfth " in Great Britain and Ireland today . The Battle of the Boyne remains a controversial topic today in Northern Ireland , where some Protestants remember it as the great victory over Catholics that resulted in the sovereignty of Parliament and the " Protestant monarchy " . In recent decades , " The Twelfth " has often been marked by confrontations , as members of the Orange Order attempt to celebrate the date by marching past or through what they see as their traditional route . Some of these areas , however , now have a nationalist majority who object to marches passing through what they see as their areas . Each side thus dresses up the disputes in terms of the other ' s alleged attempts to repress them ; Nationalists still see Orange Order marches as provocative attempts to " show who is boss " , whilst Unionists insist that they have a right to " walk the Queen ' s highway " . Since the start of The Troubles , the celebrations of the battle have been seen as playing a critical role in the awareness of those involved in the unionist / nationalist tensions in Northern Ireland . The battlefield today . The site of the Battle of the Boyne sprawls over a wide area west of the town of Drogheda . In the County Development Plan for 2000 , Meath County Council rezoned the land at the eastern edge of Oldbridge , at the site of the main Williamite crossing , to residential status . A subsequent planning application for a development of over 700 houses was granted by Meath County Council and this was appealed by local historians to An Bord Pleanala ( The Planning Board ) . In March 2008 after an extremely long appeal process , An Bord Pleanala approved permission for this development to proceed . However , due to the current economic climate in Ireland , no work has yet started on this development . The current Interpretive Centre dedicated to informing tourists and other visitors about the battle is about to the west of the main crossing point . This facility was redeveloped in 2008 and is now open for tourists . The battle ' s other main combat areas ( at Duleek , Donore and Plattin – along the Jacobite line of retreat ) are marked with tourist information signs . On 4 April 2007 in a sign of improving relations between unionist and nationalist groups , the newly elected First Minister of Northern Ireland , the Reverend Ian Paisley , was invited to visit the battle site by the Taoiseach ( Prime Minister ) Bertie Ahern later in the year . Following the invitation , Paisley commented that " such a visit would help to demonstrate how far we have come when we can celebrate and learn from the past so the next generation more clearly understands . " On 10 May the visit took place , and Paisley presented the Taoiseach with a Jacobite musket in return for Ahern ' s gift at the St Andrews talks of a walnut bowl made from a tree from the site . A new tree was also planted in the grounds of Oldbridge House by the two politicians to mark the occasion .