Complex sentence: The Pallavas attacked and weakened the early Chola state of the ancient period before the Gupta emperor Samudragupta of Magadha brought King Vishnugopa of the Pallavas under his sway in the middle of the 4th century.
Split into simpler sentences: The Pallavas attacked and weakened the early Chola state of the ancient period. The Gupta emperor Samudragupta of Magadha brought King Vishnugopa of the Pallavas under his sway in the middle of the 4th century.