On April 24, 1951, following a rout of the South Korean army, the Chinese People Volunteer Army pursued their enemy to the lines of Australian and Canadian troops still digging fall-back defences, 39 kilometres to the rear. Here, sometimes at the length of a bayonet, often in total darkness, individual was pitted against individual in a struggle between a superpower and a cluster of other nations from across the world. They fought for a valley, the ancient and traditional invasion route to Seoul...