Big Berta (WWI Germany)
Probably the most discussed of all of the big guns of the Great War is the infamous Paris Gun. Also known as Lange Max (Long Max), Big Bertha (not to be confused with the 42cm Krupp howitzer given the same nick name) and Williamís Gun; this gun was strategic, rather than tactical in nature, in that it was a terror weapon meant to demoralize the citizens of Paris. This forerunner to the Iraqi supergun could fire a shell 70 miles in about 170 seconds reaching a maximum altitude of 24 miles - quite a feat of German engineering for 1918. On the down side, the payload was only 15 pounds of explosive, accuracy was non-existent (you could hit Paris but not a specific target in Paris), and the whole gun would have to be rebored after 65 firings.