Complex sentence: However, in reality the Nazi's only saw Mussert and the NSB as a useful Dutch tool to enable general co-operation, and further Seyss-Inquart had assured Mussert post his December 1942 meeting with Hitler that general conscription was not on the agenda.
Split into simpler sentences: However, in reality the Nazi's only saw Mussert and the NSB as a useful Dutch tool to enable general co-operation. Furthermore, Seyss-Inquart had assured Mussert after his December 1942 meeting with Hitler that general conscription was not on the agenda.