Complex sentence: Even after multiple defeats, when Muhammad Ghori successfully launched attack on the forces of Delhi, Prithvi Raj requested Jaichand to fight the invader together, but he bluntly refused, instead went to the Ghori camp to fight against Chauhan.
Split into simpler sentences: Even after multiple defeats, when Muhammad Ghori successfully launched attack on the forces of Delhi, Prithvi Raj requested Jaichand to fight the invader together. To this Jaichand not only bluntly refused, he went to the Ghori camp to fight against Chauhan.