The solution to these problems began with the introduction of the SB2C-3 beginning in 1944, which used the R-2600-20 Twin Cyclone engine with and Curtiss' four-bladed propeller. This substantially solved the chronic lack of power that had plagued the aircraft. The Helldivers would participate in battles over the Marianas, Philippines (partly responsible for sinking the battleship ), Taiwan, Iwo Jima, and Okinawa (in the sinking of the battleship ). They were also used in the 1945 attacks on the Ryukyu Islands and the Japanese home island of Honshū in tactical attacks on airfields, communications and shipping. They were also used extensively in patrols during the period between the dropping of the atomic bombs and the official Japanese surrender, and in the immediate pre-occupation period.