What is the significance of lord dunmore's proclamation

Dunmore's Proclamation, also known as Dunmore's "Emancipation Proclamation, is a historical document signed on November 7, 1775, by John Murray, 4th Earl of Dunmore, royal governor of the British Colony of Virginia. The proclamation declared martial law and promised freedom for slaves of American revolutionaries who left their owners and joined the royal forces.

It is known as Dunmonre's "Emancipation Proclamation," a historical documents signed on November 7, 1775, by John Murray. 
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