The song is actually played one step down. I play it this way because it's easier 
this way, but if you want to play along with the recording, you should tune your 
guitar one step down, or put a capo on the 10th fret. It sounds great 
nevertheless. Anyway, enjoy it!

D (xx0232@1)   G (320003@1)                   C (x32010@1)          DOh (xx0232@1)I marched to the battle of New Orleans
          G (320003@1)             C (x32010@1)             DAt (xx0232@1)the end of the early British war
G (320003@1)                                 CThe (x32010@1)young land started growing
                                     GThe (320003@1)young blood started flowing
    C (x32010@1)      Am (x02210@1)        DBut (xx0232@1)I ain't marchin' anymore

For I've killed my share of Indians
In a thousand different fights
I was there at the Little Big Horn
I heard many men lying
I saw many more dying
But I ain't marchin' anymore

C (x32010@1)                     G (320003@1)       It's always the old to lead us to the war
        C (x32010@1)                 Am (x02210@1)       D (xx0232@1)       It's always the young to fall
        Now look at all we've won with the sabre and the gun
        Tell me is it worth at all?

For I stole California from the Mexican land
Fought in the bloody Civil War
Yes I even killed my brother
And so many others
And I ain't marchin' anymore

For I marched to the battles of the German trench
In a war that was bound to end all wars
Oh I must have killed a million men
And now they want me back again
But I ain't marchin' anymore

(chorus)

For I flew the final mission in the Japanese sky
Set off the mighty mushroom roar
When I saw the cities burning
I knew that I was learning
That I ain't marchin' anymore

Now the labor leader's screamin' when they close the missile plants,
United Fruit screams at the Cuban shore,
Call it "Peace" or call it "Treason,"
Call it "Love" or call it "Reason,"
But I ain't marchin' any more.