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The Black and Tans (Irish: Dúchrónaigh) were constables recruited into the Royal Irish Constabulary (RIC) as reinforcements during the Irish War of Independence. Recruitment began in Great Britain in January 1920, and about 10,000 men enlisted during the conflict. The majority were unemployed former British soldiers from England, Scotland and Wales who had fought in the First World War. Some sources count Irish recruits to the RIC from 1920 as “Black and Tans.”
The Black and Tans had a reputation for brutality; they committed murder, arson and looting and became notorious for reprisal attacks on civilians and civilian property. Their actions further swayed Irish public opinion against British rule and drew condemnation in Britain. The Black and Tans were sometimes confused with the Auxiliary Division, a counterinsurgency unit of the RIC, also recruited during the conflict and made up of former British officers. At the time, “Black and Tans” was sometimes used for both groups. Another force, the Ulster Special Constabulary (commonly called the “B-Specials”), was founded in 1920 to reinforce the RIC in Northern Ireland.
The British administration in Ireland promoted the idea of bolstering the RIC with British recruits. They were to help the overstretched RIC maintain control and suppress the Irish Republican Army (IRA), although they were less well trained in ordinary police methods. The nickname “Black and Tans” arose from the colours of the improvised uniforms they initially wore, a mixture of dark green RIC (which appeared black) and khaki British Army. They served in all parts of Ireland, but most were sent to southern and western regions where fighting was heaviest. By 1921, for example the Black and Tans made up almost half of the RIC in County Tipperary.