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"Traditore batteries, by hypothesis, fire only to the flank and rear. They are thus always placed, behind a corner; that protection is continued laterally for such a distance that a projectile from any likely direction will either meet the covering mass or pass clear of the gun muzzles." —Encyclopaedia Britannica, 1922

Traditore Battery Bourges Casemate

"Traditore batteries, by hypothesis, fire only to the flank and rear. They are thus always placed, behind…