Background
Mohun was the son of John Mohun, 1st Baron Mohun of Okehampton and his wife Cordelia Stanhope, daughter of Sir John Stanhope.
Mohun was the son of John Mohun, 1st Baron Mohun of Okehampton and his wife Cordelia Stanhope, daughter of Sir John Stanhope.
He inherited the Barony on the death of his father on 28 March 1641. On the outbreak of the English Civil War Mohun left Westminster and retired to his house in Cornwall. He eventually took up arms for the Royalist cause in September 1642 and raised a regiment of foot in his own area in spite of his unpopularity there.
He resigned his commission a year later.
He was fined for delinquency although the disputes about the amount to be paid lasted a long time. Mohun died between April and July 1665 at the age of 45.
Short Parliament]
In April 1640, Mohun was elected Member of Parliament for Grampound in the Short Parliament in what appeared to be a double return.