sentences:  A nape protection system adds ballistic protection to the rear of the head was also added as to reduce strain and improve comfort to the back of the neck.The Marine Corps placed its first order for the Enhanced Combat Helmet in July 2013, and will be fielded to deployed Marines before the end of 2013.The ECH is planned to equip all deployed Marines, while the Lightweight Helmet will still be used for training and noncombat purposes.