Complex sentence: However when the British defeated the Southern Continental Army in 1780 in the Siege of Charleston, Pickens surrendered a fort in the Ninety-Six District and he, along with his three hundred militia men, on oath, agreed to sit out of the war.
Split into simpler sentences: However when the British defeated the Southern Continental Army in 1780 in the Siege of Charleston, Pickens surrendered a fort in the Ninety-Six District. He and three hundred of his fellow militia men, on oath, agreed to sit out of the war.