Imagine you're on a small team of humanitarian aid workers sent to help the people of Yugoslavia toward the end of that awful civil war which saw Serbian and Muslim neighbors killing each other. Remember that 1990s war and all the sectarian violence? Well this film follows such a team as they seek to help displaced people survive as the peace talks bring the conflict to an end.
Tim Robbins plays a worker who goes by the letter "B" throughout the film. He and Mambru (Benicio Del Toro) are veteran aid workers and are breaking in a rookie named Sophie (Melanie Thierry). Together with their interpreter, a man named Damir (Fedja Stukan) they work at keeping the basic necessities of life, such as clean water, available to the displaced people of the war torn country.

I believe this film is an adaptation of a real life account of an aid worker. It shows the maddening interference of bureaucracy as it prevents them performing their tasks, and the delicacy with which they must navigate around the warring factions.

A documentary might convey these things as well, but would not entertain or hold your attention as this quality cast does.