The Portadown Massacre took place in November 1641 at what is now Portadown

Portadown

Portadown is a town in County Armagh, Northern Ireland. The town sits on the River Bann in the north of the county, about 23 miles south-west of Belfast...

, County Armagh

County Armagh

-History:Ancient Armagh was the territory of the Ulaid before the fourth century AD. It was ruled by the Red Branch, whose capital was Emain Macha near Armagh. The site, and subsequently the city, were named after the goddess Macha...

. Up to 100 mostly English

English people

The English are a nation and ethnic group native to England, who speak English. The English identity is of early mediaeval origin, when they were known in Old English as the Anglecynn. England is now a country of the United Kingdom, and the majority of English people in England are British Citizens...

 Protestants

Protestantism

Protestantism is one of the three major groupings within Christianity. It is a movement that began in Germany in the early 16th century as a reaction against medieval Roman Catholic doctrines and practices, especially in regards to salvation, justification, and ecclesiology.The doctrines of the...

 were killed in the River Bann

River Bann

The River Bann is the longest river in Northern Ireland, the total length being 80 miles . The river winds its way from the south east corner of Northern Ireland to the north west coast, pausing in the middle to widen into the enormous Lough Neagh...

 by a group of armed Irishmen. This was the biggest massacre

Massacre

A massacre is an event with a heavy death toll.Massacre may also refer to:-Entertainment:*Massacre , a DC Comics villain*Massacre , a 1932 drama film starring Richard Barthelmess*Massacre, a 1956 Western starring Dane Clark...

 of Protestant colonists during the 1641–42 uprising

Irish Rebellion of 1641

The Irish Rebellion of 1641 began as an attempted coup d'état by Irish Catholic gentry, who tried to seize control of the English administration in Ireland to force concessions for the Catholics living under English rule...

.
The rebellion had broken out in October 1641 and was marked by attacks by dispossessed native Irish on the English and Scottish Protestant settlers who had arrived in Ulster in the Ulster Plantation about 30 years earlier.