Revenue stamps of the United Kingdom
When Ireland was partitioned into Northern Ireland and Southern Ireland in 1921, separate revenue stamps were issued for both entities. Southern Ireland stamps saw little use since that political entity was quickly superseded by the Provisional Government of Ireland and later the Irish Free State (both of which applied overprints on various British and Irish revenue stamps). However, Northern Ireland continued to use separate revenue stamps until the 1980s. Northern Irish revenues include Civil Service, Dog Licence, Excise and National Insurance stamps, among many others.
Northern Ireland Civil Rights Association
Since Northern Ireland's creation in 1922, the Catholic minority had suffered from varying degrees of discrimination from the Protestant and Unionist majority. Many nationalist historians regard the ethos of Northern Ireland as unambiguously sectarian, however, academic and author Senia Paseta posits that discrimination was never as calculated as republicans maintained nor as fictional as unionists claimed.