Here are the chords from the Pete Seeger songbook, Where Have All the Flowers Gone?

   Dm                             Gm    Dm   Gm     Dm
  Step by step the longest march can be won, can be won
                                  Gm    Dm   Gm     Dm
  Many stones can form an arch, singly none, singly none
                                Gm                A
  And by union what we will can be accomplished still
            Gm           Dm    Gm     Dm    Gm     Dm
  Drops of water turn a mill, singly none, singly none.
  

You can also find chords in the Rise Up Singing Songbook.

I'd suggest that you might want to sing this song a cappella.

-Joe-