- The era of new wireless communications is upon us. Eventually it will penetrate into our daily life and change the way we live just like many technological innovations whose original research came from the military needs. In this paper, we investigate future wireless network especially in the hostile military environment. By combining two hottest wireless network topics, 4G (the fourth generation of cellular communication systems) and MANET (the Mobile Ad-hoc Networ), we explore potentials as well as foreseeable challenges to the wireless communications in the future battlefield..