What was Bloody Sunday?

Answer 1

Which Bloody Sunday?

Introduction

On 30th January 1972, 13 Catholics were killed when soldiers of a British paratroop regiment opened fire during a civil rights march in Londonderry. The day became known as Bloody Sunday. Its impact led to a resurgence of violent opposition to the British presence in Northern Ireland. Although the details of what took place that day remain controversial, many of the basic facts are not disputed. Click above to find out the events as they unfolded.
http://news.bbc.co.uk/hi/english/static/in_depth/northern_ireland/2000/bloody_sunday/map/default.stm

Alexandra Kollontai was one of those who witnessed "Bloody Sunday" (January 9, 1905)

Bloody Sunday, 1905, found me in the street. I was going with the demonstrators to the Winter Palace, and the picture of the massacre of unarmed, working folk is for ever imprinted on my memory. The unusual bright January sunshine, trusting, expectant faces, the fateful signal from the troops drawn up round the palace, pools of blood on the white snow, the whips, the whooping of the gendarmes, the dead, the injured, children shot.
http://www.spartacus.schoolnet.co.uk/RUSsunday.htm

The Selma-to-Montgomery March.

On "Bloody Sunday," March 7, 1965, some 600 civil rights marchers headed east out of Selma on U.S. Route 80. They got only as far as the Edmund Pettus Bridge six blocks away, where state and local lawmen attacked them with billy clubs and tear gas and drove them back into Selma. Two days later on March 9, Martin Luther King, Jr., led a "symbolic" march to the bridge. Then civil rights leaders sought court protection for a third, full-scale march from Selma to the state capitol in Montgomery.
http://www.nps.gov/history/nr/travel/civilrights/al4.htm

Answer 2

In Northen Ireland in1972 a peaceful protest march of unarmed demonstrators including women and children was fired on by British Paratroops in an unprovoked attack.
Many people were killed including children.
There has been no punishment for the killers

Answer 3

It was an incident that occured in the 1970s in Northern Ireland, in which 20-something civil rights protestors were shot by British troops during a march in Derry. Fourteen people died, half of whom were under the age of 20. Most were unarmed.