|Battle of the Curragh|
|Part of the Frontier War (Southeastern Campaign)|
Troops from the 7th Infantry Battalion opening fire on Celts at the beginning of the battle
| New Republic of Ireland
| The Celts|
|Ghinearál Robert Fitzpatrick||Fionnlagh Lachtna Ó Luain (deceased)|
| New Irish Republican Army
||Roughly 8,000 warriors|
|~2,000 Irish and Síochántan troops||~3,500 warriors|
The Battle of the Curragh was a major battle between the combined forces of the New Republic of Ireland, aided by Síochánta, and the Celts for the open plains of the Curragh. It is by far the bloodiest battle of the Frontier War, resulting in the loss of nearly 1/3 of the Irish and Síochántan force, and the deaths of half the Celt warriors.
After initial confrontations with the Celts in 2267, Republican forces, overstretched and outnumbered, were slowly pushed back east over a period of 8 years. By 2275, Celt forces had reached just a few kilometers outside of Síochánta. Republican commanders had decided that Síochánta was far too important an asset to lose, along with a need to uphold the alliance between the Republic and the city-state. Republican forces were thus dedicated to defending the Curragh, as the loss of Síochánta and the Curragh would also give the Celts an easy path to Dublin. Republican troops flooded into the Curragh, consisting of the entire 1st Brigade and a large number of Army Rangers.
The battle officially began when soldiers from the 7th Infantry Battalion encountered and exchanged fire with Celt warriors on the outskirts of the Curragh on March 18. The rest of the 7th Battalion took defensive positions near the area, while the 2nd Infantry was moved in to support. around 50 Army Rangers were placed on rotating standby in helicopters.
The next day, a force of 500 Celts charged the 7th Battalion's position. A wing of biplanes flew above the Celt assault, dropping bombs on the force. The assault was repelled, but several casualties had been sustained by the Republican forces. On the same night as the assault, a biplane scout confirmed that the main Celt army had made camp only a few kilometers from the 7th Battalion's position. Artillery was continuously fired upon the Celt force, followed by a bombing run from biplanes. They seemed to have little effect on the morale and numbers of the Celt forces.
Meanwhile, around Síochánta, Síochántan militia and Republican battalions had just completed their defensive positions in and around the farmlands of Síochánta.
The next morning, a massive force of 1,000 Celt warriors assaulted 7th Battalion's position. The battle lasted the entire day, and both sides receiving heavy casualties. Eventually, it was realized that the battalion could not hold, even with the support of 2nd Battalion. The battalions' commanders decided to call in a diversionary artillery bombardment as the battalions fell back to Síochánta. The battered battalions finally managed to reach the city early the next morning.
As the Irish retreated, the Celts advanced, pushing through biplane bombardments and any small resistance they encountered. By the afternoon of March 20, Celt forces were in sight of Síochánta. In a last ditch effort to drive them back, the 5th Cavalry Squadron, 1st Infantry Battalion, and 5th Infantry Battalion, supported by Army Rangers and the remnants of 2nd Battalion, assaulted the Celt positions, causing heavy casualties but ultimately being driven back. The Celts were not budging from Síochánta any time soon.