Awesome song. Some  of the  other tabs were right, but this is a bit easier to play. 
moved it lower down the fretboard, onto the higher strings. Don't think it's been done on 
others?
I know I've not tabbed the guitar 2 part, but if I had, I'd have kept the  intro further 
the neck. This is for single guitarists, mainly. :)
Standard tuning.
Tabbed by Tucker.

Edit: Fixed everything I missed before. Sorry, I should have checked it over properly!

      E    A    B    Abm    C#m
e|----0----0----2-----4------4------|
B|----0----2----4-----4------5------|
G|----1----2----4-----4------6------|
D|----2----2----4-----6------6------|
A|----2----0----2-----6------4------|
E|--------------------4-------------|


Intro.

e|---0---0---0---0-2---2/4-2-0-|
B|-----0---0---0---4----------4|
G|-----------------4-----------|
D|-----------------4-----------|
A|-0---------------------------|
E|-----------------------------|
                              He said...

Verse 1.

    E                      Abm
..."Son, have you seen the world?
                     A
Well, what would you say
                   E
If I said that you could?
                A
Just carry this gun,
                E
You'll even get paid.".
                           B
I said "That sounds pretty good."


Verse 2.

              E
Black leather boots,
                Abm
Spit-shined, so bright.
                A
They cut off my hair,
               E
But it looks alright.
                  A
We marched and we sang.
              E
We all became friends,
                     B
As we learned how to fight.


Chorus 1.

          C#m
A hero of war!
                       A
Yeah, that's what I'll be.
                E
And when I come home,
                         B
They'll be damn proud of me.
                C#m
I'll carry this flag;
                    A
To the  grave, if I must.
                          E
'Cause it's a flag that I love
                   B
And I flag that  I trust.


Verse 3.
                E
I kicked in the door,
            Abm
I yelled my commands.
                   A
The children, they cried,
             E
But I got my man.
            A
We took him away,
               E
A bag over his face,
                        B
From his family and his friends.


Verse 4.

                  E
They took off his clothes,
                   Abm
They pissed in his hands.
               A
I told them to stop,
                   E
But then, I joined in.
                 A
We beat him with guns
                     E
And batons, not just once,
               B
But again and again.


Chorus 1.

          C#m
A hero of war!
                       A
Yeah, that's what I'll be.
                E
And when I come home,
                         B
They'll be damn proud of me.
                C#m
I'll carry this flag;
                    A
To the  grave, if I must.
                          E
'Cause it's a flag that I love
                   B
And I flag that  I trust.


Fill (Intro).

e|---0---0---0---0-2---2/4-2-0-|
B|-----0---0---0---4----------4|
G|-----------------4-----------|
D|-----------------4-----------|
A|-0---------------------------|
E|-----------------------------|
                              She...


Verse 5.

   E                          Abm
...walked through bullets and haze.
               A
I asked her to stop;
                E
I begged her to stay.
                A
But she pressed on,
               E
So I lifted my gun
            B
And I fired away...


Verse 6.

        E
And the shells
                   Abm
Jumped through the smoke.
             A
And into the sand,
                       E
That the blood had now soaked,
        A
She collapsed,
                   E
With a flag in her hand.
                B
A flag white as snow.


Chorus 2.

          C#m
A hero of war!
                  A
Is that what they see?
               E
All medals and scars?
                 B
So damn proud of me.
                        C#m
And I brought that flag home.
               A
Now it gathers dust.
                       E
But it's a flag that I love.
                     B
It's the only flag I trust.


Outro.

         E                      Abm
He said "Son, have you seen the world?
                     A
Well, what would you say
                   E
If I said that you could?