Complex sentence: Cromwell, meanwhile, fell out of favour although it is unclear exactly why, for there is little evidence of differences of domestic or foreign policy; despite his role, he was not officially accused of being responsible for Henry's failed marriage.
Split into simpler sentences: Cromwell, meanwhile, fell out of favour although it is unclear exactly why, for there is little evidence of differences of domestic or foreign policy. Despite his role, he was never formally accused of being responsible for Henry's failed marriage.