Sheet music cover, The Battle–Cry of Freedom (“Rally Round the Flag”), George F. Root, 1862; public domain.

Yes we’ll rally round the flag, boys, we’ll rally once again,
Shouting the battle cry of freedom,
We will rally from the hillside, we’ll gather from the plain,
Shouting the battle cry of freedom!

Chorus:
The Union forever! Hurrah, boys, hurrah!
Down with the traitors,
Up with the stars,
While we rally round the flag, boys, we rally once again,
Shouting the battle cry of freedom!

We are springing to the call of our brothers gone before,
Shouting the battle cry of freedom!
And we’ll fill our vacant ranks with a million freemen more,
Shouting the battle cry of freedom!

Repeat Chorus (above)

We will welcome to our numbers, the loyal, true and brave,
Shouting the battle cry of freedom!
And although they may be poor, not a man shall be a slave,
Shouting the battle cry of freedom!

Repeat chorus (above)

So we’re springing to the call from the East and from the West,
Shouting the battle cry of freedom!
And we’ll hurl the rebel crew from the land we love the best,
Shouting the battle cry of freedom!

Repeat chorus (above)