Complex sentence: November he spent in Oxford or the neighbourhood, whence in December he transferred his headquarters to Worcester, where he remained until 11 March 1645, when he marched to Cheshire to co-operate with Rupert, Maurice, and Sir Marmaduke Langdale against General Sir William Brereton.
Split into simpler sentences: November he spent in Oxford or the neighbourhood, whence in December he transferred his headquarters to Worcester, where he remained until 11 March 1645. When he marched to Cheshire to co-operate with Rupert, Maurice, and Sir Marmaduke Langdale against General Sir William Brereton.