Complex sentence: While supporting the minesweepers involved in the mission, destroyer USS "William Seiverling" was hit three times on September 8 by ground based artillery, her fire room flooded but there were no casualties.
Split into simpler sentences: While supporting the minesweepers involved in the mission, the destroyer USS "William Seiverling" was hit three times on September 8 by ground based artillery. Her fire room flooded but there were no casualties.