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The forts would keep infantry troops and sappers at bay with mortars, machine guns and automatic rifles. The new forts were designed to ensure flanking of the intervals with casemate guns long-range, short-barrelled cannons in retractable turrets for frontal action and heavy, medium-range mortars to hit areas hidden from direct fire. This included both the gun barrel and the carriage. Thus, the piece and the envelope in which it was placed were to be indivisible. It became a policy of the CDF and later the CORF (tasked with implementing the ideas of the CDF) to create casemate and turret pieces that could not be used outside of the forts. The removal of 75mm guns from the flanking casemates at Verdun led to the diminished functionality of the forts.
#MAGINOT LINE INSTALL#
Composed of engineering and artillery experts, it met on multiple occasions to debate the nature of the fortifications to be built and to decide which types of artillery and infantry pieces to install in the forts. In the mid-1920s the French high command appointed a new set of commissions to study the future defences of the French border in the north as well as in the Alps: the Commission de défense du territoire (CDT), Commission de défense de la frontière (CDF) and Commission d’Organisation des Régions Fortifiées (CORF). The mixed-arms turret was a refurbished M1905 75mm gun turret left over from World War I. The 135mm and 81mm housed curved fire mortars. The turrets ranged from 1.98m in diameter for the machine-gun turret to 4m for the 75mm M1933 turret for two guns. There were six types of turrets used in the Maginot Line, in different sizes and styles.
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