I am writing a short paper about revolutionary weapons in both world wars. Write some headings about things I should definitely include.
Sure here are some headings about the big changes of weapons and arms in ww1:
-The growth of weapon mass production in ww1.
-The first tanks.
-Advancements in automatic fire.
-Systematic use of chemical weapons and  their effects on the war.

And some for ww2:
-Advancements in aerial combat and planes.
-The rise of missiles.
-The first nuclear bombs.

These are just some examples. I hope they help you with your paper.