The "Legend of Verdun" works better than the "Legendary Battle of Verdun"...because the point of the article is how keeping Verdun is a point of pride for the French...and yet not only did it involve a terrible loss of life, it wasn't much worth fighting for. But the "legend" part is how the pride over keeping Verdun -- i.e. the idea that holding a fortress is important -- had echoes in later military blunders of pride, such as Hilter at Stalingrad and the French, again, at Dien Bien Phu.