Operation Emerald
'Emerald' was the US contingency plan within the 'Color-coded War Plan' scheme for intervention in Ireland (then a free state within the British empire) in conjunction with 'Red' (i) (1920s/1939).
Basic overview
Start date: 30 November 1919
End date: 30 November 1938
Scope: Minor
Nature: Strategic, Amphibious
Status: Projected
End date: 30 November 1938
Scope: Minor
Nature: Strategic, Amphibious
Status: Projected