Tear gas banned in war? Hell, they use it in basic training. Perhaps Mr. Paul would prefer the method of crowd dispersal popularized by the British in Ireland and the Punjab early in the 20th century. How ‘bout a spray of heavy machine gun fire?
I suppose teargas is banned in war, because it is technical a chemical weapon
As an aside, there is a display in the Smithsonian of a Gatling Gun(the old hand cranked type) that was issued to a east coast police department.
Someone was thinking of extreme crowd control...