After the outbreak of the Civil War, Rushworth as an "embedded journalist" followed the battles of Edge Hill (1642), Newbury (1643-1644), Marston Moor (1644) and Naseby (1645).
He joined the army of the Earl of Essex after the first Battle of Newbury, and took part in the occupation of Newport Pagnell.
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By the death of his half-brother, Colonel Thomas Morgan, who was killed at the Battle of Newbury 20 September 1643, he became possessed of the manors of Heyford and Clasthorpe, Northamptonshire; and had other property in Momouthshire, Warwickshire, and Westmoreland.
Due to the village's proximity to the A34 road it was the scene of many demonstrations during "the third battle of Newbury" when the Newbury bypass was being built in the 1990s.