The creation of the six-county state (as opposed to the historic nine of Ulster) is a textbook example of gerrymandering ...

The partition of Ireland, which was finalized with the passage of the Government of Ireland Act (GIA) on December 23, 1920, involved a momentous decision by the British government.

The Government of Ireland Act of 1920 partitioned Ireland, giving Ulster the six northeast counties. In the following year the Anglo-Irish Treaty was signed, creating the Irish Free State. Article 12 ...

The Irish feud over the Boundary Question (TIME, ... but Premier Craig claimed that the boundary between the North and South had already been fixed by the Government of Ireland Act of 1920; ...

Government the Government of Ireland Act, which divided Ireland into two parts, Southern Ireland containing 26 counties and Northern Ireland containing six counties.