Original: The armies of the East India Company were recruited primarily from Muslims in the Bengal Presidency, which consisted of Bengal, Bihar and Uttar Pradesh, and high caste Hindus recruited primarily from the rural plains of Oudh.
Simplified: The army of the British East India Company recruited mostly Muslims in the Bengal Presidency (which consisted of Bengal, Bihar and Uttar Pradesh), and high caste Hindus mainly from the rural plains of Oudh.