Complex sentence: In 87 BC the town was ruined by Marius, and again in 67 BC it was sacked by pirates; after this second attack, the town was re-built and provided with protective walls by Cicero.
Split into simpler sentences: In 87 BC, the town was ruined by Marius, and again in 67 BC it was sacked by pirates. After this second attack, the town was re-built and provided with protective walls by Cicero.