One of the biggest hits of 2011, The Frontline is the simple story of a hill: Aerok Hill, a small rise on the Eastern Front of the Korean War that changed hands 30 times over 18 months of fighting. A military investigator is dispatched to see if allegations that the South Korean soldiers tasked with taking the hill are collaborating with their North Korean enemies to deliver letters to their families. It turns out that they are, and that’s the least of it. A movie about men (and some women) trying to hold onto their humanity in the midst of war, Frontline is Korea’s official submission to the Academy Awards.