Complex sentence: The 7BW is part of the Twelfth Air Force, Air Combat Command, and is is the host unit at Dyess Air Force Base; the other major unit is the 317th Airlift Group, Air Mobility Command.
Split into simpler sentences: The 7BW is part of the Twelfth Air Force, Air Combat Command. The 7th BW is the host unit at Dyess Air Force Base; the other major unit is the 317th Airlift Group, Air Mobility Command.