Complex sentence: Nevertheless, he set out from Manchester, accompanied by Brereton, on 21 January 1644 to relieve Nantwich, with a force which eventually numbered 1,800 cavalry, 500 dragoons, 2,500 infantry and a few hundred poorly-equipped "cudgellers".
Split into simpler sentences: Nevertheless, he set out from Manchester on 21 January 1644 to relieve Nantwich. He was accompanied by Brereton, and their force eventually numbered 1,800 cavalry, 500 dragoons, 2,500 infantry and a few hundred poorly-equipped "cudgellers".