Complex sentence: Jacques Ferrand was to advance from Guise with 45,000 troops to attack the east and south of the covering force, and finally at Cambrai René-Bernard Chapuy with 30,000 soldiers would attack the British under the Duke of York at the western end of the line.
Split into simpler sentences: Jacques Ferrand was to advance from Guise with 45,000 troops to attack the east and south of the covering force. From Cambrai, René-Bernard Chapuy with 30,000 soldiers would attack the British under the Duke of York at the western end of the line.