Ben Anderson, director of the documentary “The Battle for Marjah,” talks about the historic battle in Afghanistan. U.S. Marines launched Afghanistan: Operation Moshtarak, the biggest operation since the start of the Afghanistan war. The main target was the Taliban stronghold of Marjah, a town in Helmand province, in February 2010. Anderson spent two months with the American forces, and offers an intimate look at the brutal realities of modern-day warfare. “The Battle for Marjah” airs on February 17, at 9:00 pm, on HBO.