Complex sentence: It functions as a part of the Joint Staff Headquarters and garner national support for the Armed Forces and strengthen their resolve to accomplish the assigned mission while undermining the will of the adversary, it also acts as an interface between Armed Forces, media and the public.
Split into simpler sentences: It functions as a part of the Joint Staff Headquarters and its purpose is to garner national support for the Armed Forces and strengthen their resolve to accomplish the assigned mission while undermining the will of the adversary. It also acts as an interface between the Armed Forces, the media and the public.