Which offer did the British make to slaves to encourage them to join the British side during the American Revolution?

During the American Revolution, the British offered freedom to enslaved individuals who joined their cause. This offer was particularly appealing as it provided an opportunity for slaves to escape the bondage of their owners. The promise of freedom was articulated in various proclamations, most notably in Lord Dunmore's Proclamation of 1775, which declared that enslaved people who fled their rebel masters would be granted liberty if they fought for the British. This tactic aimed to undermine the colonial rebellion by encouraging enslaved people to defect to the British side.