Note: Despite the chatty and superficial coverage given in this news clip, these soldiers were probably killed in a battle rather than a mass human sacrifice. According to Science Nordic (2012), "Archaeologists have spent all summer excavating a small sample of what has turned out to be a mass grave containing skeletal remains from more than 1,000 warriors, who were killed in battle some 2,000 years ago."
Interestingly, the burials may have been a kind of a sacrifice. The soldiers were probably killed in battle, but "[t]he bones have been sacrificed [by throwing them into a bog] months or even years after the warriors were killed," according to one expert. Apparently no one knows where the battle took place, but it seems likely that it was near the location of the burial. Otherwise, it would have been "a massive logistical task for Iron Age people to transport the bones to the lake" where the bones were discovered.