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 Southern Ireland stamps saw little use since that political entity was quickly superseded by the Provisional Government of Ireland and later the Irish Free State (both of which applied overprints on various British and Irish revenue stamps).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.
Partitionism
When the island was partitioned in 1921, thousands of Irish Catholics and nationalists were left "stranded" in the "Protestant, Pro-British state" of Northern Ireland. Some nationalists have described partitionism as the belief that "Ireland" and "Irishness" is confined to the Republic of Ireland. For example, during a debate in the Dáil on 9 March 1999, Austin Currie denounced those in the Republic of Ireland who questioned the Irishness of "northern" Catholics: