Who initiated the alignment of peninsular powers against the Company in the 1770s?

In the late 1770s, Hyder Ali, the ruler of Mysore, orchestrated a powerful grand alliance of southern peninsular powers—comprising Mysore, the Marathas, and the Nizam of Hyderabad—against the expanding authority of the British East India Company. This unified anti-British front culminated in the Second Anglo-Mysore War (1780–1784).