Learning English through songs

It is the truth commonly acknowledged that you can easily learn new words and their proper pronunciation while listening to songs, providing you look up the words that are new for you.
One of the songs I recommend to you , because it is an easy and nice song, is Buffalo Soldier" by legendary Bob Marley. When I listen to the words it reminds me of  American Indians and their struggle for the land and liberation. Summing up, American history is very fascinating. Yet, the story of American Indians and Afroamericans is not that happy at times. That is a different story. I will write sth about it in the future and now enjoy the song. Click on the link to hear the song.







Buffalo Soldier"          http://www.youtube.com/watch?v=llXghWzVpB8

Buffalo Soldier, Dreadlock Rasta:
There was a Buffalo Soldier in the heart of America,
Stolen from Africa, brought to America,
Fighting on arrival, fighting for survival.

I mean it, when I analyze the stench -
To me it makes a lot of sense:
How the Dreadlock Rasta was the Buffalo Soldier,
And he was taken from Africa, brought to America,
Fighting on arrival, fighting for survival.

Said he was a Buffalo Soldier, Dreadlock Rasta -                        
Buffalo Soldier in the heart of America.

If you know your history,
Then you would know where you coming from,
Then you wouldn't have to ask me,
Who the 'eck do I think I am.

I'm just a Buffalo Soldier in the heart of America,
Stolen from Africa, brought to America,
Said he was fighting on arrival, fighting for survival;
Said he was a Buffalo Soldier win the war for America.

Dreadie, woy yoy yoy, woy yoy-yoy yoy,
Woy yoy yoy yoy, yoy yoy-yoy yoy!
Woy yoy yoy, woy yoy-yoy yoy,
Woy yoy yoy yoy, yoy yoy-yoy yoy!
Buffalo Soldier troddin' through the land, wo-ho-ooh!
Said he wanna ran, then you wanna hand,
Troddin' through the land, yea-hea, yea-ea.

Said he was a Buffalo Soldier win the war for America;
Buffalo Soldier, Dreadlock Rasta,
Fighting on arrival, fighting for survival;
Driven from the mainland to the heart of the Caribbean.

Singing, woy yoy yoy, woy yoy-yoy yoy,
Woy yoy yoy yoy, yoy yoy-yoy yoy!
Woy yoy yoy, woy yoy-yoy yoy,
Woy yoy yoy yoy, yoy yoy-yoy yoy!

Troddin' through San Juan in the arms of America;
Troddin' through Jamaica, a Buffalo Soldier# -
Fighting on arrival, fighting for survival:
Buffalo Soldier, Dreadlock Rasta.




Task 
The task is of course to answer the  question. What is the song about?