Original sentence: The capture of the city (and two other Byzantine splinter territories soon thereafter) marked the end of the Roman Empire, a state which dated to 27 BC, which had lasted for nearly 1,500 years.The conquest of Constantinople also dealt a massive blow to the defence of mainland Europe, as the Muslim Ottoman armies thereafter were left unchecked to advance into Europe without an adversary to their rear
Edited sentence: The capture of the city (and two other Byzantine splinter territories soon thereafter) marked the end of the Roman Empire, a state which dated to 27 BCE, which had lasted for nearly 1,500 years.The conquest of Constantinople not only dealt a massive blow to the defence of mainland Europe, as the Muslim Ottoman armies thereafter were left unchecked to advance into Europe without an adversary to their rear, but furthermore, accelerated the Islamic influx into Balkans, irrevocably changing the demographics of the area leading