So this TL is going to be following off of my post proposing a Jacobite victory over William in Ireland. It will be like a lot of the great TL's on this forum in the sense that I will be writing it from the perspective of various books and forums of media. Here we go, and I hope you all enjoy!
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"James' French Military Adviser, Lauzun, was the most vocal advocate of forming the Jacobite defensive line around Newry. The land was dominated by hills and ridges, perfect for screening the movement of the Irish cavalry. Lauzun noted in his journals that the only way to win against William would be to use some sort of geography for their advantage. Newry provided just that. Despite the vocal opposition of Earl Talbot, James agreed with his foreign ally and that night decided to form his defensive line around Newry. In the hilly ground of Ulster his prospects for survival would live or die, sink or swim."
King Seamus of Ireland, by Malachy McCourt (2009)

"The Jacobite defensive formation was somewhat of a lopsided U. Forming up along a ridge line were his French and Irish infantry. To either side was his limited artillery. However to their left, screened by a particularly high ridge line, were the Irish dragoons. These men came from the Irish nobility and were well equipped with the latest in military technology. They were motivated by dual forces: A Catholic King on the English throne, and a return of their land, power, and money.
William's forces would appear that morning as well. Confident of his numerical superiority, the Dutchman ordered his forces to advance across the open field in front of James' men. As the advanced, William's men were peppered by the musket fire and artillery of the Jacobites. However, William rightfully predicted that the size of his force along with the lack of muskets in the Irish ranks would mean that his forces would reach the Irish lines reasonably intact. The two forces would smash into each other, and there was much fierce fighting to be had.
The turning point of the battle was not in the melee between the two forces, but rather was caused by a particularly aware French gunner. Noticing a patch of well dressed English officers to the rear, the battery commander ordered his guns to fire at them, believing on a hunch that it was in fact King William. He was right. Several rounds of shot smashed into the ground around the King. One of them blew the legs right off of the King's horse, sending him tumbling to the ground with such force that he was knocked unconscious and broke his arm. In the ensuing chaos, many English officers believed that William had been killed and began to remove their men from the battlefield. It was at that moment that the Irish cavalry sprang into action, emerging from behind the ridge to rout the remaining English forces. William's force was destroyed, and he was badly injured himself. He would be forced to leave the field and return to England for medical attention. Most of his army would return with him, as would the entirety of his Dutch force. James had secured a decisive victory for himself, and Catholic Ireland."
Great Battlefields of the World: John McDonald (2002)

"The Irish cavalry swept forth with such force that it was clear that they could smell the blood of their foes. I know not of why, but I know that they certainly looked for their Protestant rivals, the Gentry of Ulster, to slaughter. They ran them down and lopped their heads and limbs off. It was a terribly bloody day, but it was also the greatest for all of Ireland."
Richard Talbot, 1st Earl of Tyrconnell
