The other regiments were formed under Nicholas Slanning, Sir Bevill Grenvile, Colonel John Trevanion and Warwick, Lord Mohun.
Hopton first used his forces to make an unsuccessful attempt on Exeter then fell back on Plympton, took it, and invested Plymouth on 1 December.
The Cornish forces now left Devon and things remained quiet until the encounter battle of Polston Bridge, Launceston in April.
Two days later there was another encounter battle, the "Western Wonder" of the Cavalier ballad, at Sourton Down, where in the middle of a violent thunderstorm, Chudleigh was able to hold the field and Hopton again retreated to Launceston.
This produced their most spectacular victory when, after ten hours of fighting uphill against twice their number of much better equipped enemy with a dug-in battery, the Royalists gained the position, killing 300 and capturing 1,700 with fourteen guns, £300 and plentiful provisions, at a cost of 80 men.
[1] The Cornish Royalist army then received orders to rendezvous with Prince Maurice's men, whom they met at Chard in Somerset in June.
The Cornish returned to Devon, and unfer Prince Maurice, they took Exeter on 4 September and Dartmonth on 6 October, and arrived back near Plymouth for the winter.