From what I have read the Germans surprised the French and passed the Ardennes, crossed the Meuse and began to encircle Allied forces. After the evacuation at Dunkirk, eventually General Petain, General Weygand, and the French government surrendered. What surprised me was how quickly the French surrendered. The soviets were loosing millions of troops and hundreds of square kilometer of territory, the Scandinavians and dutch didn't have a large enough army to resist the Germans, the English risked having their supplies cut off; their surrender would've made sense. In contrast, the French didn't suffer enough casualties and losses in territory and resources to support the decision to surrender in '40

So my question is what factors led to the French surrendering so early into the war? Was the situation hopeless for them and they wanted to prevent civilian casualties? Or does the blame lie with the French commanders as its often perceived.