1. A major brakthrough in WWI technology was the tank. It completely change the way fighting was happening because it could go over trenches.
<span>3. Chemical weapons - again, since the fighiting was done in trenches, throwing poisonous gas bombs within enemy trenches had devastating results</span>
3. <span>Flamethrowers - they were used to burn enemy soldiers hidden in trenches.
The north had more factories, railroads, population, and land, while the South had most of the cotton required for making uniforms. Plz mark brainliest!!
