Complex sentence: Chhatrapati Shivaji's father, Shahji Maharaj, defended the Ahmednager Nizamshahi from the Mughal attacks, in order to garner strength for the Maratha warriors.
Split into simpler sentences: Chhatrapati Shivaji's father Shahji Maharaj defended the Ahmednager nizamshahi from the Mughal attacks. The reason behind supporting the nizamshahi was to garner strength for the Maratha warriors.