Brazilian Armed Forces
In response to the attacks, the Brazilian Air Force and the Brazilian Navy sank over nine German submarines or U-boats. The following U-boats were sunk just of the coast of Brazil by Brazilian Armed Forces, U-164, U-128, U-590, U-513, U-662, U-598, U-199, U-591 and U-161. The unexpected success of the Brazilian Armed Forces against its U-boats, combined with a strong American presence in the Brazilian territory, made Germany abandon the South Atlantic after 1943.