Complex sentence: A- 1-4 engineers took much of the brunt blast of automatics and mortar fire from human waves charging and retreating many time they received A Company 4th Engineers Battalion, Combat U.S. Army.
Split into simpler sentences: A- 1-4 engineers took much of the brunt blast of automatics and mortar fire from human waves charging and retreating many times. They received A Company 4th Engineers Battalion, Combat U.S. Army.