The War of the Fields

The War of the Fields was a conflict between the Kingdom of the Reach and the Kingdom of Isles and Rivers. Enraged by raids by the Ironborn, the Reachmen invaded the Trident and paided dearly for their hubris.

Prelude
Harren Hoare had begun a massive construction in the Trident five years earlier, wanting to build the largest castle ever seen in Westeros, known as Harrenhal. In response to the massive needs of the construction, Harren gathered the Ironborn and set them upon the coast of the Reach to plunder their wealth and goods to fund the construction of the castle. The Shield Islands were devastated by the massive force of longships and their fleets destroyed. Lord Serry's daughters were carried off along with most of the wealth of House Grimm. The Redwyne fleet was waylaid by a storm that destroyed several of their warships en route to engage the Ironborn who reaved up and down the lower Mander all the way to Highgarden.

The War
In response, King Mern IX ordered the knights of the Reach to march north with him, leaving his brother in charge of protecting the Reach from the remaining Ironborn while he rode north with his young son Prince Edmund and his host of thirty thousand. The border between the Reach and the Trident was not a large one and threats from the Ironborn kept the Westerlands from granting passage to the Reachmen through their territory and the Lords of the Blackwater Confederation could not draw the ire of the Hoares.

Mern and his forces were met by a force of Ironmen and Riverlanders in the fields near Stoney Sept, where they managed to push back the forces of the Trident but it was all a trap. As they pursued the Trident forces deeper into the Riverlands, they were cut off from supplies and harried as they approached Atranta, where they were met with reinforcements by King Harren himself in the wheat fields outside the castle. The battle was joined and many were killed, with Lord Varner being personally killed by King Harren along with three members of the Order of the Green Hand before King Mern was killed by Lord Myles Piper, the Demon of Pinkmaiden. The army of the Reach routed at the death of their king, fleeing south or surrendering. Lord Vance captured Prince Edmund and was forced to turn the boy over to Harren, who swiftly tortured the boy until his death a fortnight later.

In the Reach, King Mern's brother, Garth managed to expel the Ironborn from their shores only for word of the loss of his brother and nephew at the hands of the Ironborn. He then arrived in the Riverlands with fresh reinforcements and in the first battle managed to save the day killing King Harren in personal combat, and helping his forces retreat and regroup. But this reprieve was short lived as Prince Andrik, aged 16, is crowned on the battlefield as the new King of the Isles and Rivers, in 67 AD. The Iron Helm of Kings is bestowed upon him, and the momentum of Hoare's armies continued to defeat the Reach forces. After another year, ravens were exchanged between Gardener and Hoare and peace was reached, much to the humiliation of the Gardeners.