Complex sentence: Cassius Dio, "Roman History" 42.38.3 whereupon the disheartened Alexandrians almost gave up the fight; however Ganymedes succeeded in rallying them once again, and prepared a larger fleet for another engagement which this time he was sure he could win.
Split into simpler sentences: Cassius Dio, "Roman History" 42.38.3 whereupon the disheartened Alexandrians almost gave up the fight. However, Ganymedes succeeded in rallying them once again, and prepared a larger fleet for another engagement, which this time he was sure he could win.