During the Second World War, millions of men, women and children were shot and buried by the Nazis in thousands of trenches and ditches, dug in fields and forests across eastern Europe. Using historic air photos and new exploration technology and our graphics, this documentary takes a look at the first defining act of the greatest crime in history, a holocaust of bullets that preceded the holocaust of gas. Medioto helped interpret the scientific datasets and translate these into understandable sequences by marrying these with satellite imagery whilst also plotting the Nazi advances and showing the widespread nature of these largely unmarked graves.