Conversation so far:
What was the evacuation of New York in the American Revolutionary War?
The evacuation of New York was the process of evacuating refugees, freed slaves and military personnel as the war was ending.
Was the evacuation of New York in the American Revolutionary War a success?
Guy Carleton did his best to have refugees from the evacuation resettled outside the United States.
What was Guy Carleton, 1st Baron Dorchester role in the evacuation of New York?
Guy Carleton was the commander-in-chief of all British forces in North America and oversaw the evacuation of New York.
What did Guy Carleton, 1st Baron Dorchester do in the role in the evacuation of New York?
Guy Carleton was notable for carrying out the Crown's promise of freedom to slaves who joined the British to transport them to a British colony.

Question: when was he placed in that role?
Self-contained rewrite: When was Guy Carleton, 1st Baron Dorchester placed in that role in the evacuation of New York?