Complex sentence: During Hadrian's reign, he quelled the Jewish revolts in the east of the Empire, at the loss of some 200,000 Romans, Jews and other civilians, this conflict would later become known as the Kitos War (115-117).
Split into simpler sentences: During Hadrian's reign, he quelled the Jewish revolts in the east of the Empire. With losses of some 200,000 Romans, Jews and other civilians, this conflict would later become known as the Kitos War (115-117).