Complex sentence: In July 1780 Hyder Ali invaded the Carnatic with an army of 80,000 after his success, he descended through the passes of the Eastern Ghats, burning villages as he went, before laying siege to British forts in northern Arcot.
Split into simpler sentences: In July 1780 Hyder Ali invaded the Carnatic with an army of 80,000. He descended through the passes of the Eastern Ghats, burning villages as he went, before laying siege to British forts in northern Arcot.