Shell Shock 2009 one on netflix

Tom was a soldier, a British veteran of an anonymous war from the 1990’s. Whilst serving, soldiers under his command were separated from the rest of his patrol and ambushed. His search for them leads him to a traumatized soldier, shaken and confused by something he has seen inside a farm building. Tom enters the building. What happened in there will haunt him forever. He returns a decorated hero but he can’t forget.