Sir, – Col Donal O’Carroll believes that a single Irish brigade would have been sufficient to repel a German landing in Cork harbour during the second World War and that knowledge of this problem caused the abandonment of Operation Green, the plan for the invasion of Ireland (Letters, February 16th).
There were, surely, still more fundamental reasons why no invasion was ever mounted: control of the sea approaches to Ireland by the Royal Navy and the presence in Northern Ireland of sizeable Allied forces, first British and then, from 1942, American. – Yours, etc,
CDC ARMSTRONG,
Belfast.