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.
Operation Ikarus was a World War II German plan to invade Iceland, which had been occupied by British forces during Operation Fork in 1940. The plan was never realized.
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.
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.
Operation Osprey was a plan conceived by the German Foreign Ministry and Abwehr II. mid-1942. The plan was an enlargement of Operation Whale. Planning took place in the context of American troops landing in Northern Ireland 26 January 1942, and Hitler's immediate fears surrounding this.
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.
Operation Innkeeper was an aborted plan devised in Autumn 1941 to send two Irish Abwehr agents to London on a sabotage mission.
Günther Schütz was a German citizen who worked for German Intelligence (Abwehr) during World War II, he was deployed to Ireland, however, due to being parachuted into the wrong location he was apprehended by Irish police, and spent much of the rest of the war in prison, bar a brief period on the run after escaping from prison and failed to be evacuated to France.
Walter Simon was a World War II German spy. He successfully completed three missions in England. In 1939 he was arrested by MI5, spent three months in prison, then deported. In June 1940 he landed by U-boat in neutral Ireland on a naval intelligence mission but was captured that same day and sentenced to three years in jail.
