Kuvira's spirit weapon was based on the biggest and most powerful gun ever exist!It was made by the Nazis in 1941 and its named Schwerer Gustav Gun! : r/legendofkorra

Spirit energy cannon, Avatar Wiki

Wonder Weapons of the Third Reich – Never Was

Schwerer Gustav - Hitler's giant gun - How it worked and why it

Schwerer Gustav - Hitler's giant gun - How it worked and why it

Wonder Weapons of the Third Reich – Never Was

Wonder Weapons of the Third Reich – Never Was

Wonder Weapons of the Third Reich – Never Was

Wonder Weapons of the Third Reich – Never Was

Wonder Weapons of the Third Reich – Never Was

How Similar is Kuvira to Nazis in Ideology and Actions : r

Wonder Weapons of the Third Reich – Never Was