Complex sentence: When Shivaji Maharaj became "Chhatrapati" of the Swaraj, as a symbol of sovereignty, the "Rajyaabhisheka Shaka" (The Coronation Era) was started.
Split into simpler sentences: When Shivaji Maharaj became "Chhatrapati" of the Swaraj. As a symbol of sovereignty, the "Rajyaabhisheka Shaka" (The Coronation Era) was started.