Okay, there is an alternate chord pattern and melody on a few verses.

It seems to go with these chords:

Serve God and meet your foe                C        Bm
Look upward beyond                                Am        G
Beyond the darkness that masks                C        Bm
The surprises of dawn                        Am        D
In the deep green grasses                        C        G        
And the blood stained woods                        Am        G
They never dreamed of surrendering                 Am        Bm
They fell where they stood                        C        D