Complex sentence: The Emperor then collected a large army and camped at Sikandarabad, where the Maratha chieftain Sadashivrao Bhau, Malhar Rao Holkar and 2,000 Marathas, together with Feroze Jung III, routed his army at the First Battle of Sikandarabad (1754).
Split into simpler sentences: The Emperor then collected a large army and camped at Sikandarabad. On the other hand, the Maratha chieftain Sadashivrao Bhau, Malhar Rao Holkar and 2,000 Marathas and their ally Feroze Jung III routed the Mughal army at the First Battle of Sikandarabad (1754).