Plan Kathleen, sometimes referred to as the Artus Plan, was a military plan for the invasion of Northern Ireland by Nazi Germany, sanctioned in 1940 by Stephen Hayes, Acting Irish Republican Army (IRA) Chief of Staff.
Operation Green often also referred to as Case Green or Plan Green, was a full-scale operations plan for a Nazi German invasion of Ireland planned by an unknown German officer known by the alias "Hadel" in support of Operation Sea Lion, the invasion of the United Kingdom, during World War II. Despite its detailed nature, Operation Green is thought to have been designed only as a credible threat, a feint, not an actual operation. Plan W, a planned occupation of all of the Free State by the British Armed Forces, was drafted by the British military in secret liaison with the Irish government to counteract any German invasion.
The Brandenburgers were members of the Brandenburg Nazi German special forces unit during World War II.
Frank Ryan was an Irish politician, journalist, intelligence agent and paramilitary activist. He first came to prominence as an Irish republican activist at University College Dublin and fought for the Irish Republican Army during the Irish Civil War. Ryan fell under the influence of Peadar O'Donnell, an advocate of socialism within Irish republicanism, which resulted in him breaking with the IRA and becoming involved with founding a new political organisation, the Republican Congress, and editing its associated newspaper: An Phoblacht.
Operation Lobster I was an Abwehr plan to infiltrate three German agents into Ireland, in July 1940. It was part of a wider series of missions carried out within the framework of Operation Lobster during World War II.
In 1940 the Germans decided to send agents and saboteurs to infiltrate Britain from Norway and northern France. This plan was given the codename Operation Lobster. It remained in place despite the collapse of plans for the invasion of Britain in Operation Sea Lion.
Operation Seagull was an Abwehr II/Brandenburger Regiment-sanctioned mission launched in September 1940. The object of the mission was to infiltrate the UK in preparation for Operation Sea Lion.
Operation Seagull I was an Abwehr II sanctioned mission devised in May 1942. The plan was the brainchild of Kurt Haller and an expert from Abwehr I-Wi (economic). The plan envisioned the use of an Abwehr agent to sabotage the North Scottish power station at Fort William.
Operation Seagull II was an Abwehr II. sanctioned mission planned in June 1942 as a refinement of Operation Seagull I. The plan envisioned in Seagull II was to use an Irish Abwehr agent ("V-Manner"), who would parachute into the area of south-east of Ballycastle in Northern Ireland, recruit a sabotage team from any willing IRA personnel in the area, and attack important "targets of opportunity" in the immediate vicinity. Both operations were to be controlled by radio and with each sabotage team in Ireland and Scotland liaising with each other via radio contact.
Operation Dove also sometimes known as Operation Pigeon, was an Abwehr sanctioned mission devised in early 1940. The plan envisioned the transport of IRA Chief of Staff Seán Russell to Ireland, and on the arrival of Frank Ryan in Berlin three days before the launch of the operation, it was also decided to transport him during the operation.
Plan W, during World War II, was a plan of joint military operations between the governments of Ireland and the United Kingdom devised between 1940 and 1942, to be executed in the event of an invasion of Ireland by Nazi Germany.
Friesack Camp or Camp Friesack was a special World War II prisoner of war camp where a group of Irishmen serving in the British Army volunteered for recruitment and selection by Abwehr II and the German Army. The camp was designated Stalag XX-A (301) and located in the Friesack area, Brandenburg region. The training and selection by Abwehr II and the German Army occurred during the period 1940–1943.
John Codd was an Irish-born British Army corporal during World War II, who went on to serve in the German Intelligence service (Abwehr) and the Sicherheitsdienst, the foreign intelligence arm of the SS.
The Irish Republican Army (IRA), a paramilitary group seeking to remove Northern Ireland from the United Kingdom and unify Ireland, shared intelligence with the Abwehr, the military intelligence service of Nazi Germany, during the Second World War.
Operation Whale was the name of two separate German Intelligence (Abwehr) plans conceived in 1940.
Operation Mainau was a German espionage mission during the Second World War. It was sanctioned and planned by the German secret service (Abwehr) and executed successfully in May 1940. The mission plan involved inserting Abwehr agent Hermann Görtz into Ireland by parachute.
Operation Sea Eagle sometimes referred to as Operation Dove II was a German Foreign Ministry plan conceived in May 1941 after the collapse of planning around Operation Whale.
Christian Nissen aka Hein Mück was a German sailor and yachtsman, who served with Nazi Germany's Abwehr and its special forces, the Brandenburgers in World War II.
Sonderlehrgang z.b.V. "Oranienburg" was a special forces unit of Nazi Germany's SS. It was assembled in early 1942 on the order of SS-Obergruppenführer Hans Jüttner as a rival to the Heer's Brandenburg Regiment.
Helmut Clissmann was an Ireland-based German Abwehr agent during World War II.
