Jeez, folks... the question was about singing the songs!.
It is not necessary to re-fight the entire war to answer the question.
We get enough of that in threads about the Middle-East... and not long ago, about Ireland.

No matter WHO wanted what, or who tended toward excess to win, it was long and sad and emotional... and it led to songs to express the many emotions. The songs tell much of the story, and ought to be heard.
Carry the debate over naughty soldiers to PMs! Or have a separate thread.