Defense in depth beyond the Maginot Line's strong sector

Could France's 1940 defense be made coherent enough to wargame, and what should have changed in the fortification plan?

Yes, but a credible defense needed stronger coverage to the Meuse, overlapping sectors, and at least two lines where only lighter fortifications were feasible.

The discussion asks whether France's 1940 campaign is too irrational to wargame and then turns to what a more coherent fortified system might have looked like. Hard defenses should at least have extended toward the Sambre and Meuse, covering an Ardennes advance with more than a thin screen. If a sector used lighter blockhouses rather than major ouvrages, it needed multiple lines so troops had somewhere prepared to withdraw and regroup. Strong and weak fortifications should also have overlapped instead of meeting at an easily bypassed transition. The criticism concerns insufficient depth and continuity, not a belief that one unbroken concrete wall could solve every problem.