A uniformed geological organization was re-created within the German Army by the start of World War II and developed to comprise 40 centres or teams by 1943. Many specialist geotechnical maps and reports prepared by these military geologists have survived the war as part of the Heringen Collection; some remains in the USA, but other parts are in Germany, notably within the archives of the Bundeswehr Geoinformation Office. German armed forces made use of about 400 geologists in total during the conflict, mostly in the Army. Many of their tasks involved groundwater studies, some including the preparation of groundwater prospect maps. Temporary water supplies were set up during mobile campaigns by planning efficient use or enhancement of existing civilian resources, supplemented by driving shallow ‘Abyssinian’ tube wells, for example, in Operation Sea Lion, the invasion of SE England planned for September 1940 but ultimately cancelled. Sustainable long-term supplies in militarily occupied territory were achieved by rigorous data collection and programmes of well drilling, spring capture or percolation gallery construction, one example being on the Channel Islands between 1940 and 1945. Geophysics sometimes aided the geological and borehole studies that guided deployment of well-drilling teams, for example, in 1941/1942, to support German and Italian forces operational in North Africa.
During the Second World War, the German army developed the largest organization of any nation ever to contribute military applications of earth science in wartime. In the summer of 1940, its military geologists assisted planning for potentially the greatest amphibious assault to that time in history by preparing maps which analysed the terrain of southeast England in terms of coastal geomorphology, groundwater supply, quarry sites for construction materials and off-road trafficability. These specialist maps were generated at scales of 1:50 000, 1:100 000 or 1:250 000 by annotating topographical base maps, derived from the then current Ordnance Survey maps at most similar scale, with data derived from maps and memoirs published by the Geological Survey of Great Britain or larger-scale Ordnance Survey maps. They represent an early example of geotechnical mapping skills developed more fully in the German armed forces for operations elsewhere later in the war.
The German Army developed a military geological organization during World War I largely as a response to near-static battlefield conditions on the Western Front, in Belgium and northern France. In 1916 it was assigned to support military survey, but in late 1918 it was reassigned to the engineer branch of the Army. It contained over 350 geologists and associated technicians by the end of the war. Military geologists contributed advice on engineering geology and hydrogeology (principally on water supply, but also site drainage). They compiled a large number and wide range of groundwater prospect maps to guide military planning, at scales typically from 1:250 000 to 1:25 000. They contributed advice to guide effective use of groundwater by means of dug or bored wells, ‘Abyssinian’ driven tube wells, and protected capturing of springs. Field hygiene was of particular concern, and military geologists helped to avoid contamination of groundwater, for example by appropriate siting of cess-pits and cemeteries. A few officers made use of dowsing in attempts to locate groundwater, including at least one German in support of Ottoman Turk campaigns SW from Palestine towards the British-held Suez Canal, their Austro-Hungarian allies in campaigns south against Italy and in the Balkans, but with relatively insignificant success.
An army, the Bundeswehr, was created in the Federal Republic of Germany in 1956, from the 1960s supported by full-time geologists employed as civilians but with reserve army military ranks. A peak geologist strength (about 20) was achieved in the 1980s, to provide expertise that included hydrogeology. Roles in these Cold War years were confined to Germany, but included guidance to ensure that potable water would be available both to the civilian population and armed forces during a state of emergency, and the optimum siting of boreholes to supply water to military installations. In 1993, Bundeswehr troops deployed overseas, to support United Nations (UN) peace-keeping operations in Somalia. Military geological expertise was used to site wells that enhanced secure water supplies for German and other UN personnel, and the civilian population. In 1999, Bundeswehr troops were among those of the North Atlantic Treaty Organisation (NATO) deployed to Kosovo. Wells to supply water to German troops in Albania and Yugoslavian Macedonia prior to deployment, and in Kosovo itself, were drilled under civilian contract but military geologist guidance. From 2002, Bundeswehr troops joined coalition forces in Afghanistan. Well drilling was again guided by military geologist expertise, but contract drilling proved inadequate, so was supplemented by rigs operated by military engineers. These operations have proved the value to the Bundeswehr of retaining military expertise in both hydrogeology and well drilling.
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