The Commonwealth was the republican government which ruled first England and then the whole of Britain and Ireland during 1649 - 1653 and 1659 - 1660. The term is also loosely used to describe the system of government during the whole of 1649 - 1660, the years of the Interregnum[?], although during 1653 - 1659, the government is properly called The Protectorate and took the form of direct personal rule by Oliver Cromwell, the Lord Protector.
... Governor of Greenland
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Louis Joliet, (1645-1700)
Richard Jobson
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Jean François La Pérouse, (1741-1788), French explorer of the Pacific
Meriwether Lewis, ...