Today is Memorial Day, and WGBH joins the nation to pay grateful tribute to those who have died while serving in the United States armed forces.

What is it really like to go to war? For millennia, only warriors could really answer that question. Going to War takes us inside the experience of battle and reveals the soldier's experiences as never before. War is the ultimate paradox. Filled with terror, pain and grief, it also brings exhilaration, and a profound sense of purpose. This documentary helps us make sense of the paradox and get to the heart of what it's like to be a soldier in times of war.

Watch Going to War tonight at 10pm on WGBH 2.