Translation:The soldier is being let down by the foxes.
Roughly, in the continuum of 'to be disappointed by' and 'betrayed by'. For example, when your father is supposed to pick you up at the airport, but forgets the date, and you have to take a three hour journey home by public transit, he has let you down.
so the soldiers in denmark are betrayed by foxes??? is this some kind of fairy tale or just nonsense
No, no. It's true, and by other animals too. Haven't you heard the story about Morten Bisp, who was let down by some geese?
I just had to google that:
"In AD 371 Martin was acclaimed bishop of Tours, where he impressed the city with his demeanour. He had been drawn to Tours by a ruse — he was urged to come to minister to someone sick — and was brought to the church, where he reluctantly allowed himself to be consecrated bishop. According to one version, he was so unwilling to be made bishop that he hid in a barn full of geese, but their cackling at his intrusion gave him away to the crowd; that may account for complaints by a few that his appearance was too disheveled to be commensurate with a bishopric, but the critics were hugely outnumbered."