Answer:
its beautiful indeed.... and sad at the same time x_x.....
this poem reflects light upon the young boys (soldiers) who come to take their own life (in this case so..) under the great pressure of their work on them which itself puts their life on stake,
the poet tells that these boys were once as happy to serve as we are at the soldier marches, ready to take up any trouble what he faces for the sake of the nation ,
its just this easy at the start, but we will never the know the pain and responsibility they go through in the hell (battlefield) where these once laughing young youth goes, where they might not even end up not seeing the light of another day.
hope this answer helps
:)
