could you please elaborate on the said division?
Abbreviated as "COFS", it was created in 1927.
Argentine Navy
The Submarine Force Command (, abbreviated "COFS") was created when the Navy first started using submarines in 1927. 
what is ara moreno? It was a dreadnought battleship. to which country did it belong? Argentina. does it have a naval force? Yes, the Argentine Navy ("Armada de la República Argentina"). could you mention a war that it participated in? It didn't participate in any war. does it have a submarines division? Yes, they do.
wiki:7469538
Argentine Navy [SEP] Submarine Force
The Submarine Force Command (, abbreviated "COFS") was created when the Navy first started using submarines in 1927. As of 2013 the force is based at Mar del Plata. The Tactical Divers Group is also under the submarine force command structure.