Complex sentence: On 8 September the final assault was launched on Sevastopol, and two days later, the Second Foreign Regiment, flags and band playing ahead, marched through the streets of Sevastopol.
Split into simpler sentences: On 8 September the final assault was launched on Sevastopol. Two days later, the Second Foreign Regiment with flags and band playing ahead, marched through the streets of Sevastopol.