'Selenium' was a British two-part naval minelaying and naval air offensive ('Selenium I' and 'Selenium II') against German shipping off the west coast of German-occupied Norwa... Read More

'Selfridge' was a US component of 'Juggler' (17 August 1943). ... Read More

'Selling' was a British and Free Greek naval undertaking to land on the island of Euboea a representative of the Greek government-in-exile and other personnel (5/14 September ... Read More

'Selma' was a British pair of naval undertakings ('Selma I' and 'Selma II') by a motor gun boat of the 15th Motor Gun Boat Flotilla in support of Special Operations Executive ... Read More

This was a German defence line near Kilpisjärvi on the north-western tip of the border between Finland and German-occupied Norway (late 1944). ... Read More

'Semut' was a series of Australian reconnaissance operations carried out by the 'Z' Special Unit during the final stages of World War II (March/October 1945)., This undertakin... Read More

The 'Senger-Linie' was a German defence line on the western side of south central Italy, previously known as the 'Führer-Linie' (spring 1944)., The line was held by General F... Read More

'Sentiment' was a British unrealised plan for a special forces assault operation in North Africa (1942). ... Read More

'Sentinel' was a British tactical deception using dummy equipment and other devices to make it appear that the Nile river delta in northern Egypt was more strongly defended th... Read More

'Sepals III' was a British operation by the Special Operations Executive with 'Sepals' to organise the despatch of 'Crofton', carry out sabotage activities, maintain contact w... Read More

'Sepals/Perianth' was an Allied operation by the Special Operations Executive and Office of Strategic Services to establish the clandestine 'Sepals' and 'Sepals I' bases, masq... Read More

'Septimus' was a British naval undertaking by Lieutenant P. Williams’s MGB-502 of the 15th Motor Gun Boat Flotilla to land stores and three agents, and collect five agents a... Read More

'Seraglio' was a German air undertaking to evacuate high- and middle-ranking members of the Nazi party and civil administration from Berlin to supposedly safer locations in so... Read More

'Servant' was a British unrealised plan for the use of the 'Highball' anti-ship 'bouncing bomb' by de Havilland Mosquito aircraft of Air Chief Marshal Sir William Sholto Dougl... Read More

'Sesame' (i) was the British overall study for a major raid across the English Channel to divert German military resources from the Eastern Front (spring 1942)., Operations wi... Read More

'Sesame' (ii) was the Allied programme of air attacks on German positions in the Futa and Il Giogo passes to the north of Florence in Italy (9/11 September 1944)., These two p... Read More

'Setting Sun' was a US one of a pair of strategic origins for the 'Matterhorn' bombing campaign against Japan using the growing Boeing B-29 Superfortress heavy bomber strength... Read More

The 'Sevastopol Defensive Operation' was the Soviet lengthy but ultimately unsuccessful undertaking to hold Sevastopol, which was the main base of the Black Sea Fleet, on the ... Read More

'Seventh Enemy Offensive' was the Yugoslav designation of the final German-led offensive in western Bosnia against the partisan forces of Marshal Josip Broz Tito (spring 1944)... Read More

'Sextant' was the Allied two-part conference at Cairo in Egypt (22/26 November and 3/7 December 1943)., The main political leaders in attendance were President Franklin D. Roo... Read More

'Seydlitz' (i) was a German naval attack toward the south coast of England from Brest in the Brittany peninsula of German-occupied France (27/29 November 1940)., Under the dir... Read More

'Seydlitz' (ii) was a U-boat wolfpack operation in the Atlantic against the HG.78 convoy (27 December 1941/16 January 1942)., The wolfpack comprised U-71, U-84, U-93, U-203, U... Read More

'Seydlitz' (iii) was a German offensive by Generaloberst Heinrich-Gottfried von Vietinghoff-Scheel’s 9th Army between Olenino and Bely in the west, and Rzhev, Sychevka and V... Read More

'Seydlitz' (iv) was a German operation against partisans in the region of Baranovichi area of White Ruthenia in the German-occupied western USSR (21 August/21 September 1942).... Read More

'Seydlitz' (v) was a German operation against partisans in the region of Dorogobuzh in the German-occupied western USSR (25 June/27 July 1943)., Lying on the upper reaches of ... Read More

'Seydlitz' (vi) was a German operation by Generalmajor Hans Kreppel’s 100th Jägerdivision against partisan forces in the region of Korçë in German-occupied eastern Albani... Read More

'Seydlitz' (vii) was a German landing on Hvar island off the Dalmatian coast of German-occupied Yugoslavia (3/8 September 1944)., In order to secure and at the same time conce... Read More

'SF' was a British naval and air operation against U-boats making the outbound and inbound passages through the Iceland/Færoes passage (5 August 1943 onward)., The undertakin... Read More

'SG' (i) was the designation of Allied convoys (together with a numerical suffix) plying the route from Southend on the Thames estuary to Grimsby on the Humber estuary, and as... Read More

'SG' (ii) was the designation of Allied convoys (together with a numerical and sometimes a literal suffix) plying the route from Sydney (later St John’s), Newfoundland to Gr... Read More

'SH' was the designation of Allied convoys (together with a numerical and sometimes a literal suffix) plying the route from Sydney, Newfoundland, to Halifax, Nova Scotia, and ... Read More

'Shackle' was the British cover designation of formations and units despatched from India to Iraq (April/May 1941). ... Read More

'Shade' was the British programme of naval undertakings to land and recover agents of the Inter-Service Liaison Department in the area of Admiral the Lord Louis Mountbatten’... Read More

'Shadow' was the Allied plan for US air forces to relieve RAF squadrons in Northern Ireland (1942). ... Read More

'Shaker' was the British overall designation of the night bombing technique in which the attack force was divided into three sections in the form of the 'illuminators', 'targe... Read More

'Shakespeare' was a British special forces operation by the Belgian Independent Parachute Company (5th Special Air Service) to attack German rear-area installations near Torna... Read More

'Shallow' was the British initial shipment of 63 Hawker Hurricane fighters to the USSR via the 'Dervish' (i) convoy (21/28 August 1941). , The Hurricane fighters were intended... Read More

'Shark' was the British programme of defensive measures to protect ships in the harbour of Portland, on the south coast of the UK, against attacks by German midget submarines ... Read More

'Sheet Iron' was a US undertaking by the Office of Strategic Services to assist the Italian partisan movement in the production and distribution of its underground newspaper L... Read More

'Sheikh Mahmut' was a German unsuccessful attempt to establish one or more special forces and intelligence bases in Iraq (1943). ... Read More

'Shelburne' was an Allied system using light craft (motor torpedo boats, motor gun boats and motor launches) to evacuate escaped prisoners and resistance personnel from Plouha... Read More

'Shelford' was the British naval preparation for the repair of the captured Italian port of Benghazi in Libya for service as a supply port for Lieutenant General R. N. O’Con... Read More

'Shellac' was the US tactical deception created and implemented to support the assault of Lieutenant General Mark W. Clark’s (from 16 December Lieutenant General Lucian K. T... Read More

'Shellfish' was a British naval plan to intercept U-boats and German surface warships through the use of telegraph cables as navigation aids (22 April/late April 1940). , The ... Read More

'Shingle' was the Allied amphibious landing at Anzio and Nettuno on the western side of central Italy by Major General John P. Lucas’s US VI Corps of Lieutenant General Mark... Read More

'Shinoile' was an Allied special forces operation to parachute a team into the Vendée area of German-occupied France to aid the local resistance forces (8 September 1944 onwa... Read More

'Shinryu' was a Japanese unrealised plan to attack the US naval forces off Guadalcanal in the south-eastern part of the Solomon islands group using midget submarines (25 Septe... Read More

'Ship' was a British component of 'Ration' (November 1942/1944). ... Read More

'Sho' was the Japanese strategic defence plan created by the Imperial General Headquarters in Tokyo for the strategic conduct of all Japanese operations from that time onward ... Read More

'Sho 1' was the Japanese defence plan within the 'Sho' scheme for the Philippine islands group, leading to the Battle of Leyte Gulf (July/August 1944)., Of the various defence... Read More