Complex sentence: This shows that, after suppressing the revolt of Macriani, Egypt had returned to Gallienus' control; however, in spring of 262, the city is reported to be rent by civil tumult, as a result of a new usurpation.
Split into simpler sentences: This shows that, after suppressing the revolt of Macriani, Egypt had returned to Gallienus' control. However, in spring of 262, the city is reported to be rent by civil tumult, as a result of a new usurpation.