Answer:
In simple words, Unlike WWI, which was battled in trench with machine weapons as well as biological weapons, WWII was conducted with modern weapons and equipment, with more aircraft, warships, vehicles, and submarine. During the war, special operations techniques, as well as atomic weapons and covert communications, were created.
They would bargain in groups with their employees in regards to their wages, benefits, hours, and other terms and conditions about their job.
