Complete the following sentence: France was invaded and occupied after a disastrous military campaign in May<unk>June 1940. <unk> <unk> <unk> <unk>
️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Frustration and unrest in both parts led to the emergence of the French Resistance which, by 1942, had become a mass movement.<unk> Frustration and unrest in both parts led to the emergence of the French Resistance which, by 1942, had become a mass movement.