One Piece Revolutionary Army. Dragon is the infamous leader of the Revolutionary Army who has been attempting to overthrow the World Government. They are the only force in the world that directly opposes the World Government and seek to dismantle it.
The Cuban Revolutionary Armed Forces (Spanish: Fuerzas Armadas Revolucionarias - FAR) consist of ground forces, naval forces, air and air defence forces, and other paramilitary bodies including the Territorial Troops Militia. The "Revolutionary Army" (革命軍 Kakumeigun?) is an army of globally operating revolutionaries, openly aiming to overthrow the World Government. We know that Sabo is the General Officer of the Revolutionary Army.
Many RA including Ivankov already gather at Kamabakka Kingdom.
Karasu (North Army) Karasu means crow in Japanese.
The letters "R" and "A" are displayed on each side of the dragon head. The Whole Cake Island arc of the One Piece manga is behind us, as Luffy and the Straw Hats look forward to meeting up with their crewmates. Obviously, that requires some rather powerful members.