Complex sentence: Tough Kitty's SB2Cs flew sorties against Japanese surface force in the Sibuyan Sea, these attacks contributed to the sinking of the Musashi, one of the two largest battleships in the world.
Split into simpler sentences: Tough Kitty's SB2Cs flew sorties against a powerful Japanese surface force in the Sibuyan Sea. These attacks contributed to the sinking of the Musashi, one of the two largest battleships in the world.