• Viking’s Thematic
All the giants in One Piece are all based on Norse barbaric explorers : the Vikings and their mythology.
Gungnir is the spear of god Odin, also he is the chief of the Norse Pantheon.
The Epithet “Red Hair Shanks”.
It was inspired from”Calico” Rackam Jack, famous pirates even his flag was inspired Shanks flag for the Red Hair Pirates.
Furthermore, Shanks is also inspired after Erik the Red, a Norwegian Viking.
The ship of Viking is called a Drekar. The bow with a shape of dragon.
The Red Force which is Shanks ship is similar to that ship.
Also, if you look at the photo down below the ship and flag are original of Giants Pirates crew.