Complex sentence: During his third consulate he put under siege Antium, while, at the same time, helped the Tusculans to rescue their city occupied by the Aequi; in the end, he attacked the Aequi fleeing from Tusculum, killing many of them near Mons Algidus.
Split into simpler sentences: During his third consulate, he besieged Antium and helped the Tusculans to rescue their city occupied by the Aequi. In the end, he attacked the Aequi fleeing from Tusculum, killing many of them near Mons Algidus.