I'm looking for bits of the lyrics of "Two Soldiers" I don't understand. Here's the text, it would be great if someone could fill in what's missing. Thanks in advance!

Two Soldiers

He was just a blue-eyed Boston boy
His voice was low in pain.
"I'll do you a bidding, comrade mine,
If I ride back again.
But if you ride back and I am left,
you'll do as much for me:
Martha, you know, must hear the news,
so write to her tenderly.

"She's waiting at home like a patient saint,
Her fine face pale with woe.
Her heart will be broken when I am gone,
I'll see her soon, I know."
Just then the oder came to charge
(not understood)
They said Aye (?) and away they rode
At the breaking of the day (?)

Straight was the track to the top of the hill,
The Rebels .....(rest not understood)
(not understood)
and got at them (?) as they fell.
There soon was a terrible (rest not understood)
(not understood)
And those whom doom and death had spared
Rode slowly out of there.

But among the dead that were left on the hill
Was the boy with the curly hair.
The tall gaunt man who rode by his side
Lay dead beside him there.
There's no one to write to the blue-eyed girl
The words that her lover has said:
Martha, you know, will hear the news,
But ahe'll only know he's dead.