[quote="Star_Of_Hope" pid='245930' dateline='1616560304']
I had to Google as well just now.
I didn't know the Navy is difference and Marines depend on Navy to some extent. This is news to me.
[/quote]
Marines are basically the navy’s ground forces. The Japanese word for navy is kaigun. That’s what One Piece calls them, so that would make them the navy. The Japanese word for marines is kaiheitai, which is not what they’re called in One Piece.
I’m not actually sure why the fan translations all them the marines, unless they just went off of what their hats say. That and it’s probably the fans thinking that 4kids messed up by calling them the navy in their dub, and based on their other changes, they assumed they translated that wrong too.