Sweet Low,Sweet Chariot(A cappella spirituals)

Chorus:Swing low, sweet chariot,
Comin' for to carry me home;
Swing low, sweet chariot,
Comin' for to carry me home.

I looked over Jordan,
And WHAT did I see,
Comin' for to carry me home,
A band of angels comin' after me,
Comin' for to carry me home.
Repeat chorus:
If you get there before I do,
Comin' for to carry me home,Tell all my friends I'm comin' too,
Comin' for to carry me home

I this song lyrics is about the people who come back from the war. I'm not sure whether civil wars or western expansion or else??? Howver, I like the singer's voice, it's so strong and encourage.