Our editors suggest the war will end quickly if the Union will just purchase abroad 500 rifled cannons, 200,000 mini-rifles and as many armed steamships as possible.
Perhaps wiser investments would have been 200,000 Sharps rifles (@$30 each), made in Philadelphia & Hartford and instead of foreign cannons, a new-fangled contraption being invented by a North Carolinian living in Indianapolis, a 44 year old medical doctor by the name of Richard Jordan Gatling.

The problem with the Gatling Gun in the civil war was that they tended to treat it as artillery, not like a machine gun.
It was not a long range weapon. Had they embedded them with infantry or dismounted cavalry, they could have been devastating. Imagine first day Gettysburg if Buford had Gatlings...