Battlefield

According to blind Guardian, it's based on the old scandanavian legend of Hildebrandslied. Here is the story as said from Wikipedia Hildebrand fights his own son Hadubrand. In fact Hildebrand became Dietrich's (Theoderich's) armourer, because he had to leave his home, he left his wife and his son. 30 years later, Hildebrand returns. His son Hadubrand is now ruling over his land, he is leading his army against the supposed invasion. As is customary, the two leaders meet between the armies. They start to list their family tree, in order to prevent themselves from killing a relative. Hadubrand says that he is "Hadubrand Hildebrand's son", but he was told that Hildebrand died, and he thinks that the fighter before him is using Hildebrand's name to deceive him. In fact in the original text with the end of the song is lost, but the legends and the third song tell the end of the story. Hildebrand has to kill his son otherwise he would be killed by him; he has pictures of all the warriors he killed on his red shield, and his son's picture is added to the others.