Original sentence: Ariobarzan fought skillfully against Alexander in the winter of 330 BC but could not stop the Greeks from invading, burning and destroying Persepolis, the capital of the Persian  Empire.Ariobarzan managed to hold Alexander back for 30 days and killed a large number of Alexander's troops in a ambush attack.The Battle of the Persian Gate was fought at the Persian Gate northeast of today's Yasuj (modern Iran) between a Persian army led by Ariobarzan against the invading Macedonian army of Alexander the Great
Edited sentence: Although heavily outnumbered and facing insurmountabe odds, Ariobarzan managed to hold Alexander back for 30 days and killed a very disproportionate number of Alexander's troops.Ariobarzan fought to the death against Alexander in the winter of 330 BC but couldn't stop him from invading, burning and destroying Persepolis, the capital of Persia at the time.The Battle of the Persian Gate was fought at the Persian Gate northeast of today's Yasuj in Iran between a group of Persian patriots led by Ariobarzan in a last stand against the large invading Macedonian army of Alexander the Great