 Complete the following phrase:  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 