sentences:  Defending forces continuously fired their cannons into Việt Minh human waves while B-26s, Hellcats and Privateers dropped bombs and napalm onto enemy attack waves and positions.The battles raged on until mid-morning on 2 December when all attacks abruptly stopped, leaving behind an eerie silence.On 4 December after nearly two weeks of trying to overrun Nà Sản, General Giap withdrew his troops leaving behind 1,544 dead and 1,932 wounded prisoners.