Rapaire, the difference between your examples and the song Chico posted is that your examples are still sung and can therefore claim to have acquired 'folk' status. I very much doubt the above song was sung by anyone (except in secret, maybe) after 1945. I've never come across this song even in the booklets of soldiers' songs my father left, and I suspect, as somebody else has done, that it's a song written and sung to order, as propaganda, and nothing else. For me that means it and its like do not belong in the DT.