Battle of The Yellow Ford

August 14, 1598:

The Battle of the Yellow Ford (Irish: Cath Bhéal-an-Átha-Buí) was fought in western County Armagh, Ulster, in Ireland, near the river Blackwater on 14 August 1598, during the Nine Years War (Ireland).
It was fought between the Gaelic native Irish army under Aodh Mór Ó Néill and Aodh Ruadh Ó Domhnaill and a crown expeditionary force from Dublin under Henry Bagenal.
The crown forces were marching from Armagh town to re-supply a besieged fort on the Blackwater when they fell into an ambush and were routed with heavy losses.

The Nine Years War ended in the defeat of the Ulster chieftains led by the Earl of Tyrone, Hugh O'Neill, and led to the Flight of the Earls and the Ulster Plantation.  The reverberations from this defeat have carried through 400 years of history to the present day.