In summer 1643, a
Royalist army led by
Lord Hopton invaded
Hampshire and
Sussex, whose
Wealden iron industry was Parliament's main source of armaments. Despite initial success, by early January 1644 a series of defeats led
Charles I to order a retreat into
Wiltshire. When Hopton argued for remaining in Hampshire, Charles sent him a detachment from the Royalist field army in
Oxford led by the
Earl of Forth. By the end of February, Sir
William Waller's "Army of the Southern Association" based in
Arundel had been increased to over 8,000.
Parliament ordered him to slip past Hopton and retake
South West England, lost to the Royalists after defeat at
Roundway Down the previous summer. When one of his commanders,
Sir Richard Grenville, deserted to Hopton in early March with this information, Forth and Hopton determined to seize
New Alresford, placing themselves between Waller and London. Advancing from their base at
Winchester, they reached the town late on 27 March, just ahead of the Parliamentarian cavalry under Sir
William Balfour. The next day they advanced cautiously south towards
Cheriton; as night fell, a reconnaissance patrol under
Sir George Lisle occupied an outpost near Cheriton Wood and reported the Parliamentarians were retreating. ==Battle==