He was the French general in charge of the Ardennes secondary front in 1940, yes the one that the German tanks famously broke through to encircle most of the Franco-British forces and put France to its knees in barely 7 weeks. And he fucked up the management and preparation of this front to nearly epic levels:
- he refused to have extra anti-tank equipment sent to his front
- barely reinforced his frontline, going as far a reprimanding the units that tool the initiative to reinforce their defenses
- dismissed the aerial recon reports warning of panzer division movements in the Ardennes forest
- dismissed intelligence reports from France and the UK that a Germans' offensive in the region was imminent (because yes, turns out that the Allies detected in advance the German blitzkrieg), to the point that the day of the attack he was at the theater!
- once he realized that there was an attack, he immediately relocated his HQ farther back instead of trying to organize his line before pulling out, leaving his poor army headless for several days while the Germans were tearing them a new one
- refused aerial reinforcements because that would make him look bad to need reinforcements
And his exploits don't stop here: he was the one whom Pétain sent to negotiate and sign the Armistice with the Germans, and afterward became the Vichy Regime's No 2. His incompetence is so huge that even today there's a theory that he might had deliberately sabotaged his frontline to precipitate a French defeat opening the country to a regime change. (the guy was a suspected fascist sympathizer, that's why he was sent to what the generals thought was a secondary frontline)
OTL he died on a plane crash in 1941 (and no, it wasn't a sabotage from the resistance, it was a banal accident), but it seems that in TNO France can't even have that.