InterestingInter-Irish Border near Dundalk 0000, April 24, 1944
As the day turned over, the border guards on the Northern side pushed rock and water filled barrels across the road. The border between the two Irelands was closed until further notice.
Can't see why this would be desirable. Or even feasible given the 200+ road crossings and as many more tracks.
The main road from Dublin to "Slash City" *crosses into Northern Ireland and back to Ireland several times in as many miles.
Still, I'm sure all will eventually be revealed.
* Derry/Londonderry - whichever you call will annoy one community in Northern Ireland. Hence Slash City.