He achieved this by giving assurance to Sultan Muhammad Jiwa Zainal Adilin II that his army will protect Kedah from any Siamese invasion. In return, the Sultan agree to hand over Pinang to the British. In 1786, Light negotiated with the new Sultan of Kedah Sultan Abdullah Mukarram Shah over the cession of Pinang to BEIC.[2][3] However, Light made the agreement without the consent of his superiors in India.