
English parliamentary general and politician.
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John Lambert commanded parliamentary forces at the Battle of Preston, defeating a Scottish royalist army. The victory helped secure the parliamentary cause in the Second English Civil War.
John Lambert was the principal author of the Instrument of Government, the written constitution that established the Protectorate under Oliver Cromwell. The document created a Lord Protector and a Council of State, but was never fully implemented.
After the Restoration, John Lambert was tried for treason and exiled to the island of Guernsey. He spent the remainder of his life in captivity, never regaining political influence.
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