Episode 6 of the HBO miniseries Band of Brothers takes place in the Ardennes Forest around the town of Bastogne, a setting filmed in an unconventional way. The harrowing events that transpire are seen through the eyes of U.S. Army combat medic Eugene Roe (Shane Taylor) who is tasked with treating the men of Easy Company during the famed Battle of the Bulge, Germany’s last-ditch offensive aimed at splitting the advancing Allied forces in two during the winter of 1944-45. The Belgian forest blanketed in snow may appear to be a typical set, but the winter scene actually employs a hidden trick.

https://screenrant.com/band-brothers-battle-bulge-filming-technique/