[PAR] [TLE] Phoney War [SEP] The Phoney War (French: "Drôle de guerre" ; German: "Sitzkrieg" ) was an eight-month period at the start of World War II, during which there were no major military land operations on the Western Front.  It began with the German invasion of Poland on 1 September 1939 and the declaration of war by the United Kingdom and France against Nazi Germany on none }} , and ended with the German attack on France and the Low Countries on 10 May 1940. [PAR] [TLE] Ouvrage Immerhof [SEP] Ouvrage Immerhof, also known as Ouvrage Ferme-Immerhof, is one of the largest "petit ouvrages" of the Maginot Line of northeast France.  Located near the community of Hettange-Grande, it is 7 km north of Thionville between the "gros ouvrages" of Molvange and Soetrich, the closest "ouvrage" to the Luxembourg frontier.  It was part of the Fortified Sector of Thionville, in the Fortified Region of Metz, the strongest portion of the Line.  Apart from its function as a communication post between the neighbouring "gros ouvrages", Immerhof also controlled the road and railway routes from Luxembourg, which pass in the immediate vicinity.  In addition, Immerhof protected other Maginot works in the vicinity: the casemates of Kanfen, the infantry shelter of Stressling, the observation point and shelter of Hettange-Grande, and a number of nearby blockhouses constructed during the Phoney War.
[PAR] [TLE] Phoney War [ SEP ] The Phoney War ( French : " Drôle de guerre " ; German : " Sitzkrieg " ) was an eight - month period at the start of World War II , during which there were no major military land operations on the Western Front . It began with the German invasion of Poland on 1 September 1939 and the declaration of war by the United Kingdom and France against Nazi Germany on none } } , and ended with the German attack on France and the Low Countries on 10 May 1940 . [PAR] [TLE] Ouvrage Immerhof [ SEP ] Ouvrage Immerhof , also known as Ouvrage Ferme - Immerhof , is one of the largest " petit ouvrages " of the Maginot Line of northeast France . Located near the community of Hettange - Grande , it is 7 km north of Thionville between the " gros ouvrages " of Molvange and Soetrich , the closest " ouvrage " to the Luxembourg frontier . It was part of the Fortified Sector of Thionville , in the Fortified Region of Metz , the strongest portion of the Line . Apart from its function as a communication post between the neighbouring " gros ouvrages " , Immerhof also controlled the road and railway routes from Luxembourg , which pass in the immediate vicinity . In addition , Immerhof protected other Maginot works in the vicinity : the casemates of Kanfen , the infantry shelter of Stressling , the observation point and shelter of Hettange - Grande , and a number of nearby blockhouses constructed during the Phoney War .
Immerhof protected blockhouses that were constructed during a war that lasted how long?
Immerhof protected blockhouses that were constructed during a war that lasted how long ?
eight-month period
eight-month period