Saints and Soldiers

The movie opens as the Allies discover the bloody remains of the Malmedy Massacre. We soon learn how the Germans attacked the unarmed prisoners, killing most of them. Several of the soldiers escape and hide out in a bombed-out house. There's "Deacon" (Allred) the ex-missionary who is haunted by something from his past that prevents him from sleeping for days at a time. He's also a crack rifleman. Joining him in escaping are Gould (Polinsky), the medic and a boy from Brooklyn, who seems suspicious of everyone, "Shirl" (Bagby) a tough soldier from Louisiana with a lust for killing Germans, and Sgt Gunderson (Holden) from Chicago, who takes command of the group.With the rescue of a British pilot, Winley (Heyborne), the group is complete. The obvious distrust/dislike between Winley and Shirl causes friction, but when the group finds out that Winley holds vital intelligence that will greatly aid the Allies in the ongoing "Battle of the Bulge", they agree to get him across 20 miles behind enemy lines to army intelligence.Several close encounters with Germans ensue. Deacon's psychosis continues to escalate as his visions intensify. We find out that in a recent skirmish, Deacon accidentally killed 2 woman and 6 children while trying to take out a sniper. We get to learn more about the lives of the soldiers and in one telling scene, the deep religious feelings of Deacon and contrasted with the agnostic Gould as each of them tells the story of holding a dying soldier.The men stumble upon a remote house occupied by a French woman and her child. They are warmly welcomed by the woman who provides them shelter and food. A massive winter storm slows the group as they hole up at the woman's place. Winley tries to to take off alone and a German patrol soon shows up at the house. The soldiers attack the Germans while the sharp-shooting Deacon misses an escaping German at point blank range twice. The German is caught by Winley and returned to the group. As they argue about whether they should execute the prisoner, Deacon recognizes him as a German he once encountered in his missionary work. He attributes his missing the escaping German to a divine intervention.During the night, Deacon allows the German to escape in exchange for some information about troop movements. The soldiers leave the next morning but Gunderson is shot and killed by a German patrol. A full scale fight ensues and Winley is wounded. Shirl is shot carrying Winley to safety and the two finally make peace just before Shirl dies.The three survivors are approached by a German soldier as they try to revive Winley. It turns out to be the same German that Deacon had let escape the night before. He allows them to escape and they grab an abandoned jeep and head toward the Allied lines. Disguised as German medics with a wounded soldier, they work through their way through the German lines. The Americans, thinking they are German begin shooting at them and the Germans are firing at them from behind as well. Deacon tries to hold off the Germans while Winley escapes with Gould, but is shot and killed in the fire fight. His dying vision is of the family he accidentally killed.Winley and Gould make it to Allied command and the critical information helps stop the German's offensive leading to an Allied victory in the Battle of the Bulge. Gould finds Deacon's body and takes his Bilble, thanking Deacon for saving his life.

Question: What did the allies discover at the beginning of the movie?
Answer: Malmedy Massacre remains