Fulda Gap The Fulda Gap is an area between the former East German border and Frankfurt am Main that contains two corridors of lowlands that tanks might come through . Named for the town of Fulda , the Fulda Gap was strategically important during the Cold War . The Fulda Gap was one of two obvious routes for a hypothetical Soviet tank attack upon West Germany from Eastern Europe , especially East Germany ; the other route was the North German Plain ( a third , less likely , route was up through the Danube River valley in Austria ) . The concept of a major tank battle along the Fulda Gap was a predominant element of NATO war planning during the Cold War , and weapons such as nuclear tube and missile artillery ; the nuclear recoilless gun / tactical launcher Davy Crockett ; Special Atomic Demolition Munition s ; AH - 64 Apache attack helicopter ; and A - 10 ground attack aircraft were developed with such an eventuality in mind . Use of the term " Fulda Gap " dates from at least the early 1950s . News articles of 1951 mentioned U . S . planning and the potential need for " withdrawal in front of the Soviet attack across the north German plains and through the Fulda Gap " . Strategic location . The northern route through the Gap passes south of the Knüllgebirge and then continues around the northern flank of the Vogelsberg Mountains ; the narrower southern route passes through the Fliede and Kinzig Valleys , with the Vogelsberg to the north and the Rhön mountains and Spessart mountains to the south . Perhaps even more importantly , on emerging from the western exit of the Gap , one encounters gentle terrain from there to the river Rhine , which favoured Soviet chances to reach and cross the Rhine before NATO could prevent it . The Fulda Gap route was less suitable for mechanized troop movement than was the North German Plain , but offered an avenue of advance direct to the heart of the U . S . military in West Germany , Frankfurt am Main , on the Main River , as indicated in its name . The Main River is a tributary of the Rhine River . Frankfurt / Main was not only West Germany ' s financial heart , but also home to two large airfields ( the Rhein - Main Air Base ) that were designated to receive U . S . reinforcements in the event of war . The Fulda Gap is roughly the route Napoleon chose to withdraw his armies after defeat at the Battle of Leipzig . Napoleon succeeded in defeating a Bavarian - Austrian army under Wrede in the Battle of Hanau not far from Frankfurt ; he safely escaped home to France . The route was also used by the U . S . XII Corps during World War II to advance eastward in late March and early April , 1945 . In the Cold War . Strategists on both sides of the Iron Curtain understood the Fulda Gap ' s importance , and accordingly allocated forces to defend and attack it . The defense of the Fulda Gap was a mission of the U . S . V Corps . The actual Inner German border in the Fulda Gap was guarded by reconnaissance forces , the identification and structure of which evolved over the years of the Cold War . From 1945 until June – July 1946 , reconnaissance and security along the border between the U . S . and Soviet zones of occupation in Germany in the area north and south of Fulda was the mission of elements of the U . S . 3rd and 1st Infantry Divisions . By July 1946 , the 1st , 3rd , and 14th Constabulary Regiments ( arranged from north to south ) had assumed responsibility for inter - zonal border security in the area that would later become known as the Fulda Gap . The U . S . Constabulary as a headquarters was subsequently drawn down , but individual constabulary regiments were retitled " armored cavalry regiments " . Thus , from 1951 until 1972 , the 14th Armored Cavalry Regiment ( ACR ) patrolled the Fulda Gap . After the return of the 11th Armored Cavalry Regiment from Vietnam in 1972 , the 11th ACR relieved the 14th ACR and took over the reconnaissance mission in the Fulda Gap until the end of the Cold War . The armored cavalry ' s ( heavy , mechanized reconnaissance units equipped with tank s and other armored vehicles ) mission in peace was watching the East - West border for signs of pre - attack Soviet army movement . The armored cavalry ' s mission in war was to delay a Soviet attack until other units of the U . S . V Corps could be mobilized and deployed to defend the Fulda Gap . The armored cavalry would have also served as a screening force in continuous visual contact with the Warsaw Pact forces , reporting on their composition and activities , and forcing advancing Warsaw Pact forces to deploy while the cavalry fought delaying actions . In order to defend the Fulda Gap and stop a Warsaw Pact advance ( as opposed to conducting screening and delaying actions ) , U . S . V Corps planned to move two divisions ( one armored and one mechanized ) forward from bases in the Frankfurt and Bad Kreuznach areas . From 1947 until 1951 , the 1st Infantry Division was the sole U . S . division in Germany , although the various Constabulary units taken together were equivalent to the size of another division . U . S . Army forces in Germany were increased in 1951 as a result of President Truman ' s 10 Dec . 1950 declaration of a National Emergency as a result of the Korean War , with four divisions arriving from CONUS . This included the 4th Infantry Division , which was stationed in the Frankfurt area ; and the 2nd Armored Division was located with its headquarters at Bad Kreuznach to the west of the Rhine River ; both of those were the divisions assigned to the newly activated V Corps . Within six years , unit changes resulted in the arrival ( May / June 1956 ) and stationing of the 3rd Armored Division ( 3rd AD ) around Frankfurt , and the December , 1957 arrival of the 8th Infantry Division ( Mechanized ) ( 8th ID ) in the Bad Kreuznach area . The two replaced divisions returned to CONUS . Cold War history from the 1950s of U . S . armor headquartered at Frankfurt ( and therefore having an orientation which included the Fulda Gap ) : 19th Armored Cav Group activated at Frankfurt 2 January 1953 ; on 1 October 1953 the 19th Armd Cav Gp was redesignated as 19th Armor Group . On 1 July 1955 19th Armor Group was replaced by 4th Armor Group . The Seventh Army troop list of 30 June 1956 shows 4th Armor Group attached to V Corps . USAREUR Troop Lists dated 30 June 1958 show V Corps as containing 3rd Armored Div . ( HQ Frankfurt ) , 8th Infantry Div . ( HQ Bad Kreuznach ) , 4th Armor Group ( HQ Frankfurt ) , & 3rd Infantry Div . ( which was headquartered at Wuerzburg ) . After the 1963 ROAD reorganization the 4th Armor Group was inactivated , and the 3rd Infantry Division headquartered at Wuerzburg was reassigned to VII Corps . The deployment of the 3rd Armored Division and the 8th Infantry Division to V Corps remained stable until the end of the Cold War . In practice it was unknown how effective V Corps would have been in the event of war due to the vast numbers of tanks and infantry the Soviets were able to field . In response to the quantitative superiority of the Soviet forces , the U . S . deployed Atomic Demolition Mines for many years in the Fulda Gap . From 1976 to 1984 , the 4th Brigade of the 4th Infantry Division was garrisoned in Wiesbaden and also subordinated to U . S . V Corps . For many years V Corps ' principal adversary was the Soviet 8th Guards Army , which was to be followed by additional armies ( including the four armored divisions and one mechanized infantry division of the Soviet 1st Guards Tank Army ) , making the Fulda Gap a key entry route for the Soviet Bloc to western Europe in any hypothetical battle in Cold War Europe ; both armies were well - equipped and held high - priority for receiving new equipment . Beginning in 1975 the Soviet Union focused on a strategy for attacking Western Europe which used OMGs ( Operational manoeuvre group ) to outflank the Fulda Gap . From 1979 onwards , the first V Corps unit detailed to reinforce the 11th Armored Cavalry Regiment in the Fulda Gap in the event of hostilities was the 8th Infantry Division ' s 1st Battalion , 68th Armored Regiment ( 1 - 68 Armor ) , stationed at Wildflecken to the south of the Gap . The mission of 1 - 68 Armor was to establish a defensive line across part of the Gap , providing a shield behind which other V Corps units could advance and defend . Additionally located in Wildflicken was 108th Military Intelligence , of which the Delta Company Rangers were assigned to strike at any invading Soviet forces supply lines and command structure . 144th Ordnance Company was in charge of much of the ammunition slated for 8th Infantry Division and 3rd Armor Division , as well as operating ASP # 3 in Wildflicken . 144th Ord . was also responsible for chemical and nuclear ammunition for the Fulda Gap sector , operating not only ASP # 3 but multiple Forward Storage and Transportation Sites ( FSTS ) . 54th Combat Engineer Battalion was tasked with destroying critical bridges to channel any Soviet advance , as well as provide critical engineering tasks to enable 1 - 68th Armor to engage Soviet forces . In September 1980 , the 533rd Military Intelligence ( MI ) Battalion was reactivated in Frankfurt and assigned to the 3rd Armored Division . The 533rd MI Battalion deployed assets in the Fulda Gap to provide Electronic Warfare capability for the 3rd AD Commander . The missions of the MI battalion were to identify and target invading forces for artillery and aircraft strikes as well as to intrude upon enemy radio networks using radio jamming and deceptive communications by Defense Language Institute ( DLI ) trained Russian and German linguists . The 3rd Armored Division was also reinforced with an organic attack helicopter wing , and was the first military unit to deploy the attack helicopter Boeing AH - 64 Apache in 1987 . With the fall of the Iron Curtain in 1989 , the reunification of Germany in 1990 , and the subsequent withdrawal of Soviet forces , the Fulda Gap lost its strategic importance , but it remains a powerful symbol of the Cold War .