Complex sentence: Prior to the most recent reorganization of the United States Army National Guard the unit was an Aviation unit equipped with AH-1F Cobras under the 40th Infantry Division's Aviation Brigade.
Split into simpler sentences: Prior to the most recent reorganization of the United States Army National Guard the unit was an Aviation unit. It was equipped with AH-1F Cobras, and formed part of the 40th Infantry Division's Aviation Brigade.