The Williamite left flank moved towards Drogheda, which was occupied by a Jacobite garrison.
10,000 Williamites, under the command of Meinhard Schomberg marched through the morning mist towards Rossnaree, hoping to ford the Boyne River upstream from the main Jacobite Army.
Williamite artillery shelled Jacobite positions. Jacobite sentries reported movement on the Williamite right flank and James fearing he was being outflanked, moved a large part of his army towards Rossnaree. He had taken the bait and weakened his positions near Oldbridge.
The Dutch Blue Guard began their advance across the Boyne at Oldbridge, opposed by strong Jacobite fire.
Elements of the Dutch Blue Guards (William’s own crack troops) secured a foothold on south side of the river. Jacobite infantry reformed and attempted to dislodge them with repeated attacks. Huguenot troops (exiled French Protestants) moved across to reinforce initial Williamite successes. Heavy fighting took place for the next hour.
Danish forces crossed the Boyne at yellow river to reinforce the British, French and Dutch forces fighting on the south side of the river.
Rossnaree – Jacobite Dragoons under the command of Niall O’Neill retreated after fierce fighting at this crucial crossing point on the Jacobite left.
The charismatic O’Neill was killed during the fighting and Williamites turned toward the Jacobite centre but were faced with marshy terrain at Rough Grange and a significant Jacobite force. Both sides faced each other but little fighting took place.
Jacobite infantry attempted to reform in response to the Danish advance in the centre.
To assist, Tyrconnell ordered a Jacobite Cavalry attack on the Williamite infantry. For 45mins Jacobite Cavalry mounted continued attacks. But with little success.
Additional Williamite infantry, including the Inniskillings, began crossing the Boyne at Drybridge.
William also crossed. It was reported later that his horse was briefly stuck in the mud and he was carried to the far bank by one of the Inniskilling regiment!
The thinning Jacobite line were unable to stop the Williamites and there is a real prospect of the Jacobite right collapsing. Elements of Jacobite infantry began to withdraw towards Donore Hill.
Last significant stand by Jacobite forces around Donore Hill and church ruins.
Confusion spread and Jacobites began to flee towards the bridge at Duleek in order to escape.
French troops performed a valiant rear-guard to allow the majority of the Jacobite army to escape in some sort of order.
James II fled the towards Dublin and many fully expect he will leave the country.