The ''Feste Hindersin'' renamed Gambetta fort by the French in 1919, is a military installation near Metz. It is part of the first fortified belt of forts of Metz and had its baptism of fire in late 1944, when Battle of Metz occurred. ==Historical context== The first fortified belt of Metz consists of forts de Saint-Privat (1870), of Queuleu (1867), des Bordes (1870), Saint-Julien (1867), Gambetta, Déroulède, Decaen, Plappeville (1867) and St. Quentin (1867), most of them unfinished in 1870, when the Franco-Prussian War bursts out. During the Annexation following this war, Metz, which oscillates between a German garrison of 15,000 and 20,000 men at the beginning of the period,〔René Bour, Histoire de Metz, , p. 227.〕 overtakes 25,000 men in the garrison by the time of the First World War.〔Philippe Martin, « Metz en 1900 », ''L’Express'', no 2937, .〕 Gradually Metz becomes the first stronghold of the German Reich.〔François Roth, « Metz annexée à l’Empire allemand », dans François-Yves Le Moigne, Histoire de Metz, Toulouse, Privat, , p. 350.〕 It is therefore necessary to finish the fortifications there.