Complex sentence: Lord Dorwin effectively promises no support for the Foundation, and meanwhile, concludes treaties with Anacreon, Smyrno and the other surrounding systems, that give them a large amount of autonomy.
Split into simpler sentences: Lord Dorwin effectively promises no support for the foundation. Meanwhile Dorwin has recently made treaties with Anacreon, Smyrno and the other surrounding systems, that give them a large amount of autonomy.